A spin-off of "It's A Wonderful Mei Day, Izuku!" For this chapter, it's a Not-So-Wonderful Mei Day! Someone is on the prowl to take Izuku away from her Mei. Congratulations! For that particular person may just sign their own death warrant. Enjoy!

A/N: This chapter involves characters from the "Vigilante" series. As a reminder, this is an alternative universe with OOC moments. This is a bit different from my usual yandere stories. So, pardon my experimentation.

It was a calm afternoon at a bike shop near the UA High School campus. Izuku tended to frequent the shop from time to time if time allowed. On this particular day, Izuku was called by a worker he made his acquaintanceship with one day as he and his girlfriend, Mei went out shopping. Mei had been interested in purchasing a Vespa and basically wanted to be Izuku's Haruko from FLCL. It was through that that he met workers Koichi Haimawari and his girlfriend, Kazuho Haneyama.

Izuku wiped the sweat from his forehead. In return, the skidmark of oil was on his face. He felt a presence behind him giving him a towel. "I think you might need this after all." He was a skinny man with short brown hair. He was a couple of years Izuku's senior. Koichi sat on the crate beside to open a can of beer.

Wiping his face with the towel, he frowned at him. But at the same time, Izuku developed a strong respect for the vigilante."Really, Koichi? It's two in the afternoon."

The hearty laugh roared like a lion on the prowl. He patted his stomach at Izuku's response. "You are sounding like my girl, Kazuho. Lovely gal. Well, it's five o'clock somewhere."

It was a Vespa Izuku was working on. In a favor of a Koichi, Izuku was paid to fix the motor. Part of the requirements of being Mei's boyfriend. As of now, it came to an advantage.

Needing tools, Koichi didn't mind helping him with the work. Whatever Izuku can to purchase a Vespa of his own for Mei. "Thank you, Jimmy Buffett." He reached for the toolbox.

The door opened. In came the atypical tsundere-like succubus, Kazuho Haneyama. She was eating a sandwich as her eyes lurked at her boyfriend. Grateful for Izuku, her eyes were only for Koichi. She came and tossed a can of soda to Izuku. "Thanks for taking care of this, Izuku. I wouldn't know what to do for my lazy ass boyfriend." She slapped Koichi's ass. "Love him nonetheless."

Izuku nodded as he took a soda break. "It's no problem. You are helping me on better understand Mei and her crazy hijinks."

Koichi smiled. "Speaking of the old girl, how did things fair out with Nirengeki?"

Izuku scanned the room in case a certain yandere girlfriend might be within the vicinity. He nervously laughed as he took another sip of soda. "We have all agreed that Nirengeki's belly invited himself to the knife." He belched. "That's the story we have all agreed on and we are sticking to it. Or else!"

Kazuho laughed loudly as she can next to Izuku to assist with the Vespa motor building. "Sounds like my kind of girl to me," she informed Izuku as she was handed the wench. "I wouldn't know what I would do if someone were to take my Koichi." Her face furrowed. "I don't know." Her smile spreading wider as it was becoming creepy. "I wouldn't probably lose my fucking mind." She tilted her head. "Okay?"

Izuku gave her a thumbs up. "Understand, Pop Star!"

"Hey, Pop Step whenever I am on the prowl, Izuku sweetie." She winked at Koichi as he was approaching the duo. "Koichi knows that I am his Pop Step on the streets and in between the sheets."

"Yeah, yeah, she has mentioned that," said Koichi as he came to assist with the repair. "I remember the time when a girl came in here and acquired assistance." He looked at Kazuho.

"You can explain. I trust Izuku," she confirmed as she winked. She nudged Izuku. "Understand that certain yandere girls stick together. I share Mei's pain when certain bitches wanting our men."

Koichi explained how one evening, a pretty foreign girl came to shop and was quite fond of him. She was friendly, always patting him on his back. He stated that it was too close to comfort for Kazuho.

"So, I came in and directed her to my customer service." She paused, gripping hard on the wench that she was holding. "Let's just say her legs that sported those pretty boots were no longer made for walking."

Koichi smiled nervously. Both he and Izuku looked at each other. Those splits seconds indicated to each other and what were they getting into for dating predatory, but loving girls.

"Koichi, Izuku sweetie," said Kazuho as she was smiling. But not in a friendly way. "Let's assume that you guys were thinking on kind of presents you want to buy us girls."

Koichi and Izuku looked at each other again. "Yeah, yeah."

At the end of the day, Kazuho gave him payment for today's work. Izuku, Kazuho, and Koichi walked out of the shop as Koichi locked up.

"Plans for the evening, Izuku," asked Koichi.

"Head home. With Mei out of town, gives me some time to relax," replied Izuku as he stretched his arms.

"She locked your jewels. Didn't she," asked Kazuho as she winked, holding on to Koichi tightly.

"Con gusto," replied Izuku.

"Don't worry, Izuku. It's not that bad, replied Koichi. "Sometimes it gets kinky whenever Kazuho needs to extinguish her frustration after a bad day." The sadistic succubus confirmed as she was waving through her poofy pink hair. "But that is how I show my love. And you love me for it." She kissed him on the cheek. She turned to Izuku. "Anyway, me and Koichi have a date tonight. So, we will catch you later."

Izuku waved the pair off as they went their separate ways. Izuku heard a rattling of a bell as the couple went off. The poor lad is sporting it now. God, what's wrong with us?

Izuku was in the mood to have breakfast for dinner. He knew about the diner nearby his dorm. The taste of french toast and chicken wings were making his mouth water. He picked up the pace as he was heading towards the diner.

As he saw the approaching neon lights of the diner, he tried to cross the street. However, a car stopped him at the intersection.

It was one of his favorite cars, a gray Audi QR-5. The windows were tinted, the paint job looked recent. Judging by its condition, it was fully loaded. It was the vehicle of his dreams. The Audi pulled the window down, showing the person driving the vehicle. Upon sight, he knew who it was. She was a thin older woman with short hair. She was quite stern, yet fair in personality. However, around him, she displayed a different light. Unlike in comparison with her son, who happens to be the acquaintance of Izuku.

Right in his sights was his acquaintance's mother, Shoko Haimawari.

"Izuku," she called him in a calm demeanor.

"Evening, Auntie," he responded as he bowed to her.

"What are you doing out here by yourself at this hour," she asked him with a motherly tone.

"Doing a little evening run," he told her, obviously lying. "Enjoying the cool air, feeling the breeze on my skin."

She furrowed her eyebrows. She scanned his attire. She gave a smirk. She knew that he was lying.

"I didn't know that jeans, a t-shirt, and boots were a new trend," she told him. She put her car into park. She went to the passenger side to open the door. He went inside the vehicle.

They didn't go anywhere. There was no tension. It was very calm. He trusted her and didn't have any reason to be scared of her, he thought.

"Izuku, I have told you that you should careful around car parts," she informed Izuku. "You know that you are too young."

"I am fine, Auntie Shoko," replied Izuku. "Just doing light work with your son."

She leaned back at her seat. "Well, at least you and Kazuho can keep my poor son in check. Yet again, don't need your pretty hands can cut by the dirty grease monkey stuff."

"I think I will be okay," replied Izuku. "Plus, I am trying to get money for this Vespa for Mei."

Shoko shifted her eyes to her window. "Yeah...Mei. Anyway, where are you heading?"

"I was planning to get something to eat at that diner," he said to her, pointing at the place.

She chuckled. "Now, Izuku, you are not going to get any nutrition from eating at those heart-clogging place." She puts the car back in drive. "Is your roommate expecting you home any time soon?"

"No, ma'am," he told her.

"Your girlfriend?"

"She is out of town."

She displayed a smirk. "Excellent! You are coming to my house. I will make you a meal that will whet your appetite."

"I am fine, Auntie. I don't want to pry."

"I insist. Plus, did your mother teach you to respect your elders?"

"Yes, ma'am."

"Good! Now, put on your seat belt," she told him as they left the intersection and headed to her house.

To be continued….

There was silence. Kazuho knew Koichi was nervous, but that was how she enjoyed her men. Something of dominating a man appealed the tsundere, perverted pinkette. She swayed her hips, rocking her skirt to the bed where Koichi lied. He didn't put up a fight as she took his arms and tied to the head of the bed with her stockings. With her other stockings, she used them to tie his ankles. She let out a small cry as she went back to the dresser and pulled out a small bandana. Normally, a ball-and-gag would have sufficed, but it was broken after the last game of Goat and the Stable. It was a few weeks ago and resulted in Koichi having a sore pelvis and Kazuho having a sprained wrist.

"For the record, sweetheart, you know that I love you," she said as she was sporting her hero uniform. She was also sporting a whip that she borrowed from a mutual acquaintance.

Her boyfriend muffled through the bandana. Love you, too! Do your worst!

Kazuho developed a sinister grin. "Trust me, I will!" She snapped the whip. "Say my name, bitch!"

A phone call interrupted their session. She was grateful that she dodged the whip or else it would have hitten his pretty face. She reached for the phone and saw it was Mei. She told Koichi to wait a moment as she took the call.

"Hey, Mei. I was in the middle of something. What's up," she told Mei.

"Hey, Izuku isn't answering his phone. I wanted to see if you have heard from him recently," said Mei.

Mei only trusted a couple of people. She wouldn't dare ask the other interlopers without wanting to place harm on them. However, with Kazuho, there was a relationship between the two. It takes a yandere to know a yandere.

"We saw him earlier before we parted ways," said Kazuho. "Maybe he is asleep."

"I doubt it. I have his Deku Memo for everything," said Mei.

"You're right," said Kazuho. "Listen, do you want me to help find him."

"Yes, please," said Mei. "Because right now, I am quite unavailable at the moment." She paused for a moment. "I said shut the fuck up," she yelled from the other end. "Do I need cut off the other ponytail?"

"Let me guess? Someone tried to put the moves on Izuku," she questioned.

"You know it! But I won't hurt them much! Need to give her a reminder on why she was so friendly to Izuku when we enter that Wal-Mart," said Mei.

"I am a greeter. That's my job."

"I am cutting the other ponytail. So, if you don't mind to checking on Izuku, that would be great. I left the tracking the device at his dorm. Go and I promise I owe you," said Mei.

"No problem, girlfriend," said Kazuho before turning off her phone. She turned to her boyfriend. "Relax for the moment, sweetheart. I got to go make a run."

"Am I going to be tied up until then," questioned Koichi.

"Is that really an option, baby," replied Kazuho as she kissed him. "I won't be too long. Gives you time to think about what ideas to give me pleasure." She left the television on for him as she left the apartment.

Even as she stepped out the apartment, she already had a feeling that someone was prying on her friend's territory to get to Izuku. And being a good friend, she was going to help her yandere sister.

To be continued...for real this time.