After Ochako and Saiko  cheated on Izuku with his so called brothers Katsuki and shoto who didn't give a fuck about him not even once as they lied on him with Shoto fucking up as Momo saw him holding hands with another girl which Ochako Saiko and Katsuki looking at him stupid that he cheated on Momo with them and now both Izuku and Momo left and left for a few months as the 4 got suspended for cheating and attempted lying. Soon after that Momo started to love Izuku as he did the same for her and they had their first ever kiss and so on. As Katsuki straight up and lied in front of Inko of Izuku cheating on a girl she got Izuku and changed his DNA so she won't have anyone as a cheater in her house and soon enough Izuku went for her mother Nana Shimura and starts dating her too. After Inko finds out the truth of Izuku not cheating due to Katsuki lying to her since he sees that hes making Izuku life more perfect then what it was as he came clean and try to kill Izuku. Soon after Izuku gotten 2 more girls since the incident happened he was living a pretty decent life.

Ship

Izuku x Harem

Main

Nana and Momo

Rest (just 2)
Rin

Yor

And btw this is a quirkless Au and Yor was once Inko friend and she only did it due to Izuku being legal as she wants to ravage him and now that she heard about Izuku DNA being changed she stops coming around and starts going for Izuku (I know it sounds like she's a hoe but trust me she isn't a hoe she feel deeply in love every time she sees him) for Rin she is Izuku friend that she visit every summer but came back before them as she also has a crush on him like Yor does. And also Izuku wasn't scared of both Ochako and Saiko as he didn't feel any love after 3 months he wanted to take them on dates to get his love back for them to grow but they kept refusing and he starts to see now as they cheated. And yes when Inko hears that her former son is gonna be her new father she lost it