Losing his father when he was young, and currently lives with his mother, the protagonist―― Morino Kento. In his second year at Aketo Hanabue Private Academy, he goes on a school trip which takes him far away from his hometown, to a place filled with exotic tourist attractions. But at that destination, Kento's cousin lives there, and it is a town where he is already familiar with, so he does not expect anything much, however...

Caught up in a commotion caused by Shishikura Ooga―― An extremely shy childhood friend who comes from the strongest lineage in human history. Helping a girl in trouble, becoming a "hero" for Karakuchi Hibana―― An ojousama who visits the same tourist attraction by chance on the school trip. Getting acquainted with Amaeda Chiwa―― A cute local student and his cousin's best friend. Earning respect as a "hero" from Aijou Michiru―― A signboard girl in the shopping district at the tourist attraction.

What should have been a school trip with nothing to expect turns out to be an exciting trip filled with new encounters. However, when such a trip comes to an end in the blink of an eye, parting ways with these girls (except Ooga), Kento feels a bit lonely. But with the end of such trip―― from now on with these girls, comes the start of the new love stories.