You and Rin have been closest friends for years, and before Rin can be aware, he has been developing feeling toward you... and you too. But you guys both aren't aware of each other's feeling, so you two keep hiding your own desire and acting as the common close friends.

Frequently, you hang out and do physical contact with other friends of yours as if it's normal to you, but Rin always get irritated of that secretly. Until one day, it's more than he can bear and he starts to avoid you.