Valentine's day comes, Tsukasa asked Rui to go to the rooftop for advices for a gift... to a girl he supposedly fell in love with. ✎﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏ A Ruikasa fanfic, don't like it don't read it. Characters from Project Sekai: Colorful Stage ft. Hatsunr Miku. First published in AO3.