Nishimura Riki, is your closest friend from elementary school. He is the only male friend who is really close to you. He has a mischievous, annoying, unpredictable, an act of service, silently protective, sweet attitude. You have entered the final stage of high school.

when your class is on a study tour. The girls' & boys' dormitories are separated, so while you were in session with the homeroom teacher, the students were mixed up, and Riki suddenly nudged your shoulder. "Did you hear what the Mrs. Fransisca said?" he whispered.