Saga 1: Twins' beginning starts here
Chapter 1: Meet Kouna and Hisashi Midoriya
After the Wedding, newlywed couple Izuku and Ochaco Midoriya rode Eternatus to Hawaii so they can enjoy their honeymoon and do make out sessions. When they reached their honeymoon suite, Izu gives his Ochaco her favorite toys to play with before telling her the times that they're going to have their make out sessions at, causing Ochaco to make happy noises before asking her Deku if they could do it now, which also caused Izu to smile at his wife before saying ok. A montage then begins until three days later during the couple's week on their honeymoon as Ochaco starts whimpering because her stomach started swelling, which caused Izu to panic and takes her to the Hawaiian hospital. A doctor then does some tests before telling Izu and Ochaco that they're going to have twins because Ochaco is pregnant, causing Izu to become flabbergasted while his Ochaco made excited noises until the doctor and a nurse calms her down. That evening, the couple went to their rooms, where Izu started pacing around as he processes the fact that Ochaco became pregnant during the honeymoon until he thinks for a moment and decided that since the pregnancy usually takes nine months, he'll need to be more careful when being on his Ochaco. Soon, Ochaco herself called her Deku over so they can dance to prove it from the Backstreet Boys before going to bed. However, the next morning, Ochaco freaks out as doctors and nurses takes her to a room to give birth to the twins, while Izu himself remain right by her side as he holds her left hand tight as she hits herself with her right hand. Soon, Izu became worried as he asks the doctor how can this be possible because pregnancy was supposed to be nine months, causing the doctor to calm him down before explaining that by some miracle, the process of the pregnancy speed up, causing Izu to sigh in exasperation before asking Ochaco if she drank the water from the miracle fountain before they got married, (something that Komoria and her mom made after the news of Mina's miscarriage) which also caused Ochaco to made a sad noise as she nods yes. Soon, the doctor told the couple that they need to get back to Harmony Island to let a professional deliver the baby, causing Izu to tell his comrades the news before he and Ochaco gets on a plane back to Harmony Island. When they got back, everyone sang the first song called "Harmony", which ends with Gwen and Henry telling everyone that they are going to have a baby shower before helping Ochaco gives birth to twins.
That evening, Izu gets congratulated by his fellow council members and heroes as they say that the miracle fountain that Komoria and Morgan made really did work, because Mina just gives birth to a baby boy named Shenko before they heard news about Ochaco's pregnancy, causing Izuku himself to express how sudden it was because he wasn't expecting babies to come this quickly. Suddenly, Arnold told Izu that he's needed to tell everybody the names of the upcoming twins, which caused him to start sweating before taking a deep breath as he walks toward Ochaco, who is now holding her stomach tight. The couple then revealed that before the war against the VOWD, they decided on these potential names depending on the genders of the twins. For the girls, there's Kouna and Akko, and for the boys, there's Hisashi and Katchem. Ochaco then explained that once she gives birth to the twins, they are going to give them the room across to her and Izu's room because it's technically the twins room, causing everyone to clap for the couple as the party begins. After an hour, Ochaco starts screaming because her water broke, causing the monsters (including Ultra, Whobert, Fuego, Peter, George, and Eternatus) to tell everybody to make some room while Izu hold Ochaco's hand with their comrades surrounding them until Eraserhead volunteers to deliver the twins. Soon, Eraserhead brought out a healthy baby girl, who began crying, causing everyone to go aww until Eraserhead brought out a boy, who just looks at everyone emotionlessly before waving hello slowly. Ochaco then starts rocking as she made more excited noises until Izu calms her down, causing Eri to ask her big brother if the twins' names are Kouna and Hisashi, or Akko and Ketchem, which also caused Izu and her Ochaco to look at each other before smiling at each other.
Izuku then takes a deep breath and decided to hold his newborn son before saying that his name will be Hisashi Midoriya, which caused Ochaco to smile before revealing the newborn daughter's name to be Kouna Midoriya. Everyone then cheers as most of them makes baby noise, causing Kouna to laugh and interacts with everyone while Hisashi just stare at them confused before covering his ears with an annoyed expression. Kouna got most of her looks from Ochaco, which includes her hairstyle and brown color of her hair itself. However, she got Izuku's youthful freckles. Hisashi got most of Izu's look, which includes his hairstyle and color of it. However, he got Ochaco's rosy cheeks. Plus, Kouna's eyebrows are just like her father, while Hisashi's eyebrows are just like his mother. Finally, Kouna seems to have tareme eyes, while Hisashi have Tsurime eyes. Soon, Mina and Eijiro introduced their son Shenko to the twins, causing Kouna to make excited noises until her quirk immediately manifested, causing everyone but Hisashi to become shocked, because Kouna's quirk is one for all. Soon, the couple takes the twins to their mansion, with Eri, Seija, Saizu, and Kota right behind them.