Synopsis: Chisa x Pon

Ponta looks forward to the first major event in his high school life, an opportunity to finally lose his virginity. He makes plans to go to the beach with his friends Taro and Jiro, accompanied by three girls - Emi, Rumi, and Chisa. The group decides on pairs by playing janken, and Ponta is thrilled to be paired with Chisa, his preferred choice. However, his dreams are dashed when Chisa is not as willing as he had hoped. Despite his friends' persistent teasing, Ponta remains a virgin at the end of the trip. To his surprise, Chisa asks him to stay in touch, and they begin a romance that faces several challenges. Chief among them is Chisa's innocence, which leads her to resist physical intimacy at the same pace as Ponta. Although he loves her deeply, Ponta accepts this and vows to support Chisa on her voyage toward womanhood. However, a terrible occurrence arises as a significant obstacle in their relationship.