To be able to borrow his jacket, one specific event must be completed: the firefly event. As WhiteBear25 mentions, there are guides available. They’re not up to date with the options to select on day 12, but are still relevant. I’ll be working on updating them a bit later.
Viewing post in Homecoming ~Morenatsu Revisited~ comments
oh wow! Idk how I've never seen the guides in the "here" link above. well i appreciate the help with that, I honestly didn't think anyone would reply but I'm grateful both of you took the time to. so thank you both again for the help ^_^ (also WhiteBear25 that "evade Torahiko breaks my soul only just because i turned him down to go to the pool and he was crying and I wanted to cry for making HIM cry x_x!!! never again! lol)