That figure was like a beam of light, entering her small world and making her chase after him with all her heart. By chance, a classmate introduces them as pen pals. She knows who he is, and this gives her the chance to get to know the real him. Her young crush is both sweet and painful. When she learns there's another girl by his side, she buries her burning feelings deep inside and goes to a university in the south after the college entrance exams, in a city without him. Years later, they meet again and can finally spend time together openly. Their hearts gradually beat as one, and she slowly learns to face her own feelings, wondering what kind of sparks might fly between them. A girl secretly loves a boy in their youth; after they reunite, he pursues her.