Story
"This guy's my lover." Ryou quit his job after his girlfriend invited him to join a pyramid scheme. One day, when he went to her home, he was worried about her and found a large number of Yakuza! Ryou is in a desperate situation when he is suspected of being in league with his girlfriend, who has absconded with money belonging to the Daikoku clan, and is rescued by Miyoshi, a junior high school classmate who happens to be a member of the Daikoku clan.
Synopsis via AniList (English).