Hikari Tsutsui (a.k.a “Tsuttsun”) is a high school student who is content with his virtual life of anime and video games. One day, he gets stuck cleaning the pool with Iroha, a real live girl who is stylish, sassy and known to be easy with boys… and she aggressively approaches him! Tsuttsun, who has few friends and lives in his own world, finds himself smitten by the confident and wild Iroha… and his whole world is turned upside down!! It’s the awkward and pure love story of a boy who experiences relationship for the first time.
Note: The series originally ended with 12th volume, but with the anime adaptation, the author released an extra chapter (bangai-hen). The chapter was published as 13th volume in 2017 digitally only. It is not a proper volume, and Kodansha Comics didn't publish this chapter in .