This Boy Suffers from Crystallization (2014)

Original title: この男子、石化に悩んでます。

Movie · 27 min · Directed by Soubi Yamamoto · TMDB 5.1/10 (9 votes)

Ayumu, struggling with a rare condition that turns him to stone, creates a new persona for himself, but his feelings grow for his teacher, Kouya, who sees beauty in his transformation.