Watanabe Iori

Fukumori Daichi, who will be in his 2nd year of high school this spring, has lied that he has a younger sister in order to have a topic of conversation with a girl he has a crush on. Just when Daichi was about to tell the truth, a mysterious beautiful girl who calls him "Onii-chan" appears! Daichi is surprised to see his sister who came out of a lie, but an even more startling situation awaits him! B-B-Before something happens... he has to ask his sister!

Ebisawa Ginpei is considered a delinquent. But that's not his true nature. (Maybe.) As he continues his (misguided) quest to learn about himself, he meets his classmate Chigusa Somei (a monster with a desire for 120% approval) and discovers the dangerous depths of philosophy! The wheels of adolescence are now set in motion for two people with mutual interests…!