Boku no Natsuyasumi 2: Umi no Bouken-hen[b] is an adventure video game developed by Millennium Kitchen and published by Sony Computer Entertainment for the PlayStation 2.

It is an alternate universe sequel in which the main character spends his summer in a different part of Japan from the first game.

It takes place during the same summer with many of the same characters, but in a different location, a town on Japan's southern coast.

[1] The main character spends his summer vacation at his aunt and uncle's bed and breakfast in a southern Japanese coastal town.

Features from the first game, like collecting and bug battles, return, along with new facets, like swimming.