From Chibi Manga:
Shinji, Manabu and Chinatsu are neighbor and childhood friends. Because they hide their thoughts from each other, their feelings became lock inside their heart. At that time, Manabu informed the other about “that things”. He could trust his friends forever, but what will happen when they grown up and start to change the way they feel about it…?
Included is the oneshot: I Just Love You.