Tightly clutching his Gibson guitar, Mafuyu Satou steps out of his dark apartment to begin another day of his high school life. While taking a nap in a quiet spot on the gymnasium staircase, he has a chance encounter with fellow student Ritsuka Uenoyama, who berates him for letting his guitar's strings rust and break. Noticing Uenoyama's knowledge of the instrument, Satou pleads for him to fix it and to teach him how to play. Uenoyama eventually agrees and invites him to sit in on a jam session with his two band mates: bassist Haruki Nakayama and drummer Akihiko Kaji.

Koombaya, it's Eek the cat and all his friends. Annabelle, Eek's 800-pound girlfriend, Sharky the vicious but lovable sharkdog, and Elmo the elk. Plus you can watch the Terrible Thunderlizards try to make Bill and Scooter, the cavemen, extinct. Plus there's Klutter who's, well, we're not exactly sure what Klutter is, but watch and find out for yourself.

Go Dong-man, a former taekwondo champion, and Choi Ae-ra, a receptionist, struggle to follow their dreams as life throws obstacles in their path.