Let's Go Karaoke!
Narita Kyoji 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 Oka Satomi and he invites him to go to a karaoke place to teach him to sing. Kyoji badly wants to improve his singing so he won't place last in his gang's karaoke competition. Meanwhile, Oka Satomi is a 3rd grade junior high school students and leads the school choral club. Satomi 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 is embarrassed by the unexpected request from Kyoji. (Source: AsianWiki; edited by MyDramaList) Adapted from the manga "Let's Go Karaoke! (カラオケ行こ!)" by Wayama Yama (和山やま).