Kusahara Nayuki, age 15, First Year High School Student. Adept at both studies and sports and with excellent grades, is said to be a diligent and good girl. But that status was completely a side effect of her need for 「Being Praised」... ! Appearing in front of such a Nayuki in the midst of her school life, and snatching the 1st place in the measure of a good girl, decided by absolute numbers, the「School Year Results」was... Eh!? The Hero of Darkness!!? *Note: Includes the one-shot "Blue Spring (ブルースプリング)".,/i>*

Yui, who enjoys saving money, has become impatient with the fact that her friends around her are getting married rapidly since she turned into Alaska. Then, she is approached by her boyfriend, Toshiya, who wants to meet and talk. Could it be a marriage proposal? Yui is elated, but not only Toshiya, but also Yui's best friend Asuka shows up at the meeting place...! A love story about a girl in her twenties whose life changes drastically after meeting an idol!