Part 1

Yamaguchi and Yachi are dating and Tsukishima thought he was ok with it. Then he suddenly starts to cough and vomit flower petals which are a sign of one-sided love. He doesn't have the money to get the flowers in his throat removed so his only option to tell Yamaguchi how he feels. If he doesn't tell him the flowers will continue to grow and Tsukishima will die.