Sukisho - Complete TV Series, Volumes 1-3 (Full Frame)

Sora fell from the roof of his high school and was knocked unconscious.

When he finally awoke, he found a kind-hearted boy named Sunao waiting over him.

Sunao claims to be his best friend, but the fall erased some of Sora's memory.

He doesn't remember Sunao at all, the wide-eyed young man acts like much more than just a friend.