Tsuiteru Kanojo.

ツイテル彼女。

Yoshida Kazuki is your average office worker who has been a virgin for who knows when, and on a faithful day with a meeting with his chief, he met a girl named Futaba who is a very cute and lovable girl... and became his girlfriend... but there's a secret between this relationship. This is a start of an unordinary love. (Source: Kisu KMS)