Gokudou-san
In the *Gokudou-san* series: V.1 - *Gokudou-san wa Papa de Aisaika* Sachi is the physician of Amamiya clinic. One day, suddenly his yakuza childhood friend Kengo told him to raise Mushi, whose birth was kept secret. Thereupon, for Mushi’s sake, he pretends to be Kengo’s lover and lives with him?! He hates Kengo, who’s a yakuza, but… As they taking bath and going to amusement park together like a real family, the bond gets strengthened… A love story between the yakuza, egoistical childhood friend and the beautiful, tsundere physician who’s doting on the child. V.2 - *Gokudou-san wa Kyou mo Papa de Aisaika* Now that his love for his childhood yakuza friend Kengo is requited/mutual, Sachi started a new life, in which he, Kengo and Fumi, the kid with special circumstances, live together