High school in Kanagawa, the beautiful Shonan coast, the flowering season of seventeen or eighteen, and the rainy season. The ordinary and lovely girl Mika Shibata transfers to another school and meets her childhood sweetheart Shuji Tanejima again. She was supposed to have a beautiful story with him, but unexpectedly another boy Irie Kanata appears in her life. How will this story about friendship and love continue? The relationship between the three people is so beautiful, happy but confusing and sad. On the other hand, Tokugawa Kazuya and Echizen Ryuya, who returned to Japan from Germany, and Kimijima Ikuto surround themselves with another shy girl Ayako, and gradually learn to give and face their own feelings.