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Originally written by and illustrated by sune , the series spans various formats:

The beautiful, third-year president of the calligraphy club. Yuika Koga: A library committee member of foreign descent. Mao Nanjo: Keiki's tsundere classmate. Originally written by and illustrated by sune ,

Determined to identify his "Cinderella," Keiki investigates several girls who were in the clubroom that day: Originally written by and illustrated by sune ,

As Keiki gets closer to each candidate, he discovers that every single one of them harbors a "hardcore" perverted fetish, ranging from extreme masochism to fetishes involving specific scents. Originally written by and illustrated by sune ,