Haruka, a high school student living in the countryside near the sea, was supposed to be going about his daily life as usual today. But on his way home from school, he encounters a man with a suspicious looking hood. He has a kitchen knife in his hand and a bucket of... fish? The suspicious atmosphere is overwhelming, but he turns out to be a graduate student from the city who studies marine biology... Despite his flamboyant appearance, he is a serious and gentle man who seems to unexpectedly take a liking to Haruka...? The somewhat lethargic but straightforward world of a high school student begins to sparkle with a summer encounter. (Source: Brite Shuppan, translated) Note: Includes an extra chapter.