This Boy Suffers from Crystallization

About the story

High-school student Ayumu Tamari is troubled by a condition that makes his body turn to stone when he feels stressed. He decides to use repeating a school year as an opportunity to change. He updates his hairstyle and clothes and starts following trends to find things to talk about, but day after day his efforts lead nowhere. His homeroom teacher, mineral-loving earth-science teacher Koya Onihara, is concerned about him, and Ayumu begins sharing his worries with him…