Yuutousei wa Unmei no Akai Ito Ni Sakaraitai

Miyanari, a diligent student, unexpectedly notices a red thread of fate linking him to Hashiba, a delinquent in the same class. Despite his initial disbelief, the thread seems to bring them together in various situations, such as when Hashiba assists with Miyanari's injury or when they are accidentally locked in a room. As they spend more time together, Miyanari begins to see a kinder side of Hashiba, one that contrasts with his rough exterior.