BFD-001 I don't want to just be friends

Ai and Chiharu are classmates and best friends who go to the same school. However, Ai feels more than a friend towards Chiharu. Ai, who can't control her overflowing feelings, tells Chiharu about her feelings... However, Chiharu is just bewildered. After a week of awkward time between the two, Ai calls Chiharu. "Forget about that..." However, she received an unexpected reply from Chiharu. "Let's go out together..." The two of them, who are going to date, secretly develop love so that their classmates won't find out, but there is something that worries Ai...