Here is my list of what if's. You can post your one too. Cheers. Feedback quite appreciated.
1) If Saku Saku was mixed with KS, i would replace immediately Misha with Ann Jinpou with the knowledge of Shizune's deafness Misha had. Eleonora, which uses the same body as Ann - senpai
2) If Koi to Sankyo to Chocolade was mixed with Katawa Shoujo, then Satsuki would help Lilly to get back to the Student Council, starting a rivalry with Shizune for the Student Council and Hisao, Hazuki would have a lovely partner in Mutou, Hanako would be relinquished by Lilly to Michiru Morichita, hanging with her around, Chisato would be a partner for Kenji, which would be a bittersweet relationship, she would scold him many times for notoriously bringing feminism up, yet quite active around, pinching him on his cheek, and being friends with Emi. Misha would like Nozomi, Ai and Kii around, which would help around the clubs in Yamaku or in the council.