Izuku visits a shrine in Tokyo with Eri, and falls down a well, at the same time a girl falls down the well at a different time period, from before Quirks emerge, that girl is Kagome. The three are attacked by a Centipede woman while falling.

Inuyasha is a Girl, named Inuko
Izuku asks for a Seal to be placed on Yura like Kagome does with Inuko.
Because Izuku is a pure Cinnamon roll, most women find it hard to harm him, including Sesshomaru, who is also a girl. He first demonstrates his power when hes fights Lady Centipede alongside Inuko, flicking his fingers. Izuku can casually visit home, its summer and Eraserhead decided to let his class go after the long year they've had.

Also, I'd like it if someone would use this, the time of heros takes like, what, 80 or more year in the future, so it's a easy use, plus at the end, everyone could go with Izuku to his time. Izuku actual has a quirk that was impossible to activate unless was thrown through time, which he was, so now he can generate time portals.

Note: Inuyasha, Sesshomaru, and Hiten are women. Izuku and harem are a best match.