Hello everyone,

I just want to warn you that this chapter is different from the previous chapters. At least the first half, as it's an info dump of something that I'm introducing.

If you guys don't like the concept, I would only do it once and be done with it.

I hope you enjoy the chapter.

...

In the backyard of the Hyoudou Household, Serafall is jumping with joy. Why? Because she finally got a wedding ring from Issei. As with the other three, Serafall also had to go through the same trial as they did. The Wedding Rings used the law of Death from Issei and surrounded it on Serafall, making her hallucinate her greatest fear.

Earlier, within the hallucination, Serafall saw Issei and Sona live a life without her. While the two enjoyed their lives, Serafall was forgotten. What made this worse is when the hallucination showed Sona and Issei having children, not once did the couple ever mention Serafall's name, as she was forgotten. To no longer be loved and cared for by the people she loves the most. That's Serafall's greatest fear. She overcame her fear, as she believed not only in Issei but also in her sister.

Serafall's ring was white and gold bands intertwining with a pink gem in between.

"He-he-he…I finally have a wedding ring from Issei!" Serafall was admiring her ring as she jumped around. She has wanted to be with Issei in a more intimate capacity, but to think that she would be intertwined with him. That was even better. "This is the like the ultimate marriage…I love it!".

Issei was laughing at Serafall's enthusiasm.

"Oh, by the way, Issei. I was told to remind you that the Peace Treaty for the other mythology will be happening in the Underworld. I don't know why they asked me to remind you, but I decided anyway," Serafall said. She then remembered that she needed to meet with Sona as she was teaching her how to perfect transformation magic. "Shoot! I need to get going. Sona is expecting me today!".

Before Serafall left, Issei gave her two Legend Rank Storage rings. One for her and one for Sona. After that, Serafall said her goodbye and hightailed it to Sona's house. As for Issei, he sighed at Serafall, but in the end, he smiled. The way Serafall acts is one of the reasons Issei loves her.

Since it was the weekend, Issei didn't have anything to do and was too lazy to train. From time to time, even Issei wants to have a day where all he does is rest.

"Hey, system," Issei called. He hasn't rolled his Gacha for the day. Issei was hoping to get something interesting. "Can you spin the Gacha for me?".

[Gacha is now rolling]

[Congratulation! Issei received (Challenge – Legendary). The User may access the reward within the Inventory]

"Huh? That's new," Issei said. This was the first time he received an item that just said challenge. "System, can you explain the item I just received?".

[Challenge Cards are special category cards that give a challenging quest. Once completed, the User will be able to spin the Gacha and gain a guaranteed rarity depending on the challenge card's rarity. Since the rarity you got is Legendary, upon completion of the challenge, you can spin the Gacha and get a Legendary]

"How would that work?" Issei asked. How would it guarantee the rarity when thousands of items are in a single spin? "Can you explain how the item would guarantee the rarity?".

[That's simple. All items in the Gacha wheel will be changed into Legendary items]

"Huh? All ten thousand items in the Gacha would be Legendary. That's quite amazing," Issei said. That would be quite a sight to see. "Anyways, can you give me the details of the Challenge Card?".

[Challenge Card – Danmachi

Within a world known as Danmachi, a dungeon exists. Reach the Hundredth Floor to receive the rewards. Restrictions will apply while inside the dungeon. Breach of a restriction would result in a failed challenge.

Restrictions:

- [Loop of Binding] cannot be unsealed inside the dungeon.

- [Robe of the Sage] cannot be used inside the dungeon.

- [Laws] cannot be used inside the dungeon.

- [Divine Healing] cannot be used inside the dungeon.

- [Detect Origin] cannot be used inside the dungeon.

- [Sever Origin Connection] cannot be used inside the dungeon.

- [Divine Regeneration of the Vermillion Bird] cannot be used inside the dungeon.

- [Descent of the Lightning Dragon] cannot be used inside the dungeon.

- [Great Barrier of the Black Turtle] cannot be used inside the dungeon.

- [Super Strength of the White Tiger] cannot be used inside the dungeon.

- [Re-Taekwondo] cannot be used inside the dungeon.

- [Half-Dragon Form] cannot be used inside the dungeon.

- [Excalibur] cannot be used inside the dungeon.

- [Balmung] cannot be used inside the dungeon.

- [Enkidu] cannot be used inside the dungeon.

- [Dimension Farm] cannot be used inside the dungeon.

- Any Strengthening Magic cannot be used inside the dungeon.

There are no restrictions when outside the dungeon. All skills and abilities are available for use and won't breach the restriction of the challenge.

Rewards:

- Legendary Rarity Guarantee x2

- Chance Upgrade Card x5

All rewards are given upon completion of the challenge]

"That's not as difficult as I thought," Issei said. Quite a few of his favourite magic were unavailable, but he has others. For example, [Divine Regeneration of the Vermillion Bird], he can just use Avalon to heal if he was hurt, which was unlikely due to Armour of Fafnir. "Rather than the Legendary Rarity Guarantee, I'm more interested in the Chance Upgrade Card. System. What does it do? I mean, I have an inkling of what it does, but to what extent, I don't know".

[It's as the name suggested. The Chance Upgrade can be used in any of the items received from the Gacha. However, the higher the rarity the User wishes to upgrade, the lesser its effectiveness.

- Rare – 80% success rate

- Epic – 60% success rate

- Legendary – 40% success rate

- Mythical – 20% success rate

- Demi-God – 1% success rate

As for the God Rarity, they can no longer be upgraded as they've already achieved the peak]

"Now, I'm excited to do the challenge," Issei said. He was smiling. If he can get the Chance Upgrade Card, then some of his inventory items can be upgraded to a higher rarity. "If I can get the Chance Upgrade Card, I can finally raise the rank of (Training Room – Legendary) and increase its ability to break the limit of those that train inside. But most of all, I can't wait to get more challenge cards in the future to push myself. If the restriction of a Legendary Rarity Challenge Card is this high, I wonder about the higher rarity version".

Issei was smirking. Using his credits to search for Challenge Cards inside the Gacha Shop would be worth it.

"Now that I think about it, I didn't see the Challenge Card once when I was refreshing the store many times," Issei said. How rare was the card? He didn't know, but the system did. "Hey, system. How rare are the Challenge Cards?".

[Challenge Cards are the God rarity of each Rarity. They are the rarest of the rarest in their own rarity. As for the reason? You can imagine how much of a cheat it is to be guaranteed a rarity]

"True that! Imagine getting a God Rarity Challenge Card and completing it. That would be a guaranteed God Rarity spin," Issei said. He then had thought of something. "System, the higher the rarity of the Challenge Card, the more difficult, isn't it?".

[Correct. God Rarity Challenge Cards are beyond challenging. Most of the time, the restriction in God Rarity would make sure that you are not allowed to use most of your skills, and there would be a time limit to complete the challenge]

In the afternoon, Issei wanted to speak to his parents. It was finally time for them to consume the alchemy pills he created for them. He also wanted them to cultivate the Heaven's Path Cultivation Manual. At least in the beginning stages, but if they want to continue, he'll help them to the end.

"Issei, what is this all about?" Miki asked. She could see that Issei was quite serious. "It's been a while since I've seen you this serious. The last time was when you told us about you being part of the Supernatural world".

"I was telling you about how I have something you can train and gain the strength of a Middle-Class Devil this morning, right?" Issei said. Miki and Gorou nodded at him. "Here, take this".

Miki and Gorou took the copy of Heaven's Path Cultivation Manual.

"Heaven's Path Cultivation Manual? Is this the same cultivation as the things on Tv and some of the drama I watch?" Miki said. She looked at the manual. "You didn't get scammed when you bought this thing, did you? If you did, I would be quite disappointed in you".

"Trust me, it's not fake. Yang Xin and Ning'er cultivates it," Issei said. He then gestures to his parents to read the book. "Go on, read its content and follow the guide. Once you complete it, you'll know whether it's real or fake".

Miki and Gorou started reading the contents of Heaven's Path Cultivation Manual. However, since Issei's parents aren't well versed in cultivating, it took them two hours to achieve the beginning stages of Heaven's Path. As with Yang Xin and Ning'er, the moment Miki and Gorou achieved the beginning stages, their power rose exponentially and reached the strength of a Middle-Class Devil.

"Oh, my," Miki said. The strength she could feel emanating from her body was nothing like being a normal person. It felt like the moment she touched something, it would break. "This is amazing. I didn't know that cultivation is real. I believed they were only for drama and whatnot".

"You'd be partly correct," Issei said. Miki and Gorou looked for him for an explanation. So, he did. "Our world does not have cultivators, and they don't have real cultivation techniques here. But that doesn't mean it's not real in other worlds".

"Other worlds?" Miki asked. She saw Issei smirking. Her son once again told her something amazing. "Is that where you and Raynare went? To another world?".

"That's right. We went to the world of Yang Xin and Ning'er," Issei said. Recounting the world of the Divine Continent, Issei was glad that his family was from Earth. "The world they came from was quite brutal. Every day, they face Demonic Beast attack or other cultivators who are arrogant and pick a fight".

"It sounds like one of the novels that Raynare reads," Miki said. Sometimes, Raynare would leave some of the novels that she reads in the living room, and Miki would read them. She took a liking to some of them. "Maybe someday I might get to visit such a world, but not the dangerous ones".

"Well, in the future, if you both desire to go for an adventure, I can send you to other worlds," Issei said. If it's for his parents, he would gladly let them, but he would send someone to protect them. "By the way, here, dad. Take this".

Issei gave the Nine Five Brick – Bat version to Gorou.

"If there is a chance that someone may be capable of infiltrating the house, you can use this and bonk them in the head. One head in the head is all that's required as they would immediately pass out," Issei said. Gorou stared at the bat and started swinging it around to test it out. He then smiled. "I see that you like it".

"Yup, it's quite light and balanced," Gorou said. He was admiring the bat. "I've never held a bat of this quality before. Back in high school, the bats were old and rickety".

"You can put the bat down, Dad," Issei said. Although Miki and Gorou have already achieved the beginning stages of Heaven's Path, he still has a few gifts to give. "Now that you've cultivated the Heaven's Path Cultivation Manual, I still have a few things to give you".

Issei handed a few different pills to Gorou and Miki. They were Anti-ageing Pills, Soul Nurturing Pills, Body Refining Pills, and Beautifying Pills.

Hearing the names of a few of the pills, Miki and Gorou didn't hesitate to swallow them. Doing so knocked them out. Issei laughed at his parents' antics. He carried them to their rooms, but he made sure to first cover their beds in a protective film as the pills would push out some of the impurities from their body, thanks to the Body Refining Pills and Beautifying Pills.