Yūko Kurose

Fifteen-year-old Yuna prefers staying home and obsessively playing her favorite VRMMO to doing anything else, including going to school. When a strange new update gives her a one-of-a-kind bear outfit that comes with overpowered abilities, Yuna is torn: the outfit is unbearably cute, but too embarrassing to wear in-game. But then she suddenly finds herself transported into the world of the game, facing down monsters and magic for real, and the bear suit becomes the best weapon she has!

With Japan having developed as a maritime nation, it became necessary to have specialized schools to teach skills essential to protecting the sea. The setting is one such all-girls school. The girls who enroll here study to become "blue mermaids," through classroom instruction and teaching of practical skills. "Blue mermaids" are women who pursue the ocean for their professional occupation. They live by the motto "In the sea we live, the sea we protect, and by the sea we go." They must excel in their studies, but must also adopt an international mindset. They are the "Elite of the Sea," and are expected to be knowledgeable of the customs and cultures of other countries as well as their own.

Kuroki Tomoko is a super popular, high school girl who has had 50 years of dating experience and 100 boys... in the Otome game world. In the real world, she is a 15-year-old shut in who has all of the qualities of a "mojo" (a gloomy or unpopular woman). However, when school isn't going as she expected, and she isn't as popular as she had thought she was, she takes a look at herself in the mirror for the first time in a few years, and has some shocking revelations...