Kyoji Narita is a high ranking yakuza member. On a rainy day, he wanders on the street. He hears a singing sound and he walks towards the sound. There, he meets junior high school student Satomi Oka and he invites him to go to a karaoke place to teach him to sing. Kyoji Narita badly wants to improve his singing so he won't place last in his gang's karaoke competition. Meanwhile, Satomi Oka is a 3rd grade junior high school students and leads the school choral club. Satomi Oka has a sincere personality, but he often makes biting remarks. He has one problem, which is that he has difficulties with high-pitched notes due to his voice going through puberty. Satomi Oka is embarrassed by the unexpected request from Kyoji Narita. Based on manga series "Karaoke Iko!" by Yama Wayama (published August 25, 2019 by Kadokawa) (Source: Asianwiki)