Hihi :D ! I’m glad you enjoyed Akira and Genesis’s routes!
To get Gani’s route you need to be a bit of an instigator in the first day. This is just off the top of my head but I believe the order is:
Ask Genesis why they didn’t do anything, popcorn, continuously ask about Gen and Akira’s relationship, reply to his messages with emoticons, complain about them to Rumi, woof!
You have to intentionally not get any other points with the other two, or try and get less points with them or else it may default to placing you in either of their routes