It's what I was trying to do, but honestly, what's stopping me from doing it is getting the 1000 coins to be able to continue with the story and buy the erotic image because honestly, it took me a long time to get it.
Found the bug, if you decide not to continue the fight against Susamaru and instead you get to Amane's mansion when you get back the game will skip from the mission against Kanao, Muu and Zeniko to the mission against Rui's familly which requires that you talk to Shinobu but you cant without getting Kanao.