Love Knot(2007)

Love Knot

Tomoya rejected the confession from his classmate, Kazuki, stating height as the main reason. Two years later, Kazuki became taller and came back once more. However, the Kazuki that used to protect Tomoya in fights became gentle and kind. Will Tomoya be able to face his own feelings now and accept Kazuki? Includes the individual stories of the twins, Yuu and Kaede, with their lovers, Shougo and Jin and two one-shots.
(from Attractive Fascinante)