Adult PC Game: Sister x Sister ~Lovevery Sisters~ by Apricot Cherry Archive

Kazuhisa is in love with Aika, who is beautiful and smart. Every male student loves Aika, but no one ever makes it. One day, he tells Aika that he loves her.... No, he doesn't make it, either.... When he feels down, Suzune, his classroom teacher, cheers him up.... They, however, gradually fall in love with each other and....