BFD-001 I don't want to remain friends

Ai and Chiharu are classmates and best friends who attend the same school. - However, Ai has feelings for Chiharu that are more than friends. - Ai can no longer suppress her overflowing feelings and tells Chiharu about her feelings... - However, Chiharu is just confused... - A week later, Ai calls Chiharu. - "Forget about that..." However, Chiharu gave a surprising response. - ``Let's start dating...'' The two start dating and secretly develop their love so that their classmates won't find out, but Ai has something that worries her...