Jealousy Vol. 1 (manga)

The prequel to the popular yakuza rom-com Fourth Generation Head: Tatsuyuki Oyamato!

A yakuza head finds himself ensnared in the unwavering attentions of a sometimes impetuous but always cunning schemer. If being yakuza doesn't get him killed, his new lover just might!

Uichi Rogi is in a bind, both literally and figuratively, when he meets Akitora Oyamato, the yakuza head who's come to collect a debt from Uichi's lover. Instantly smitten, Uichi concocts dubious and often dangerous schemes to get closer to the man, but his lies come at a heavy price--one he may regret having to pay for Akitora's affections.