All You Need Is Love Series by Jinko Fuyuno, Noboru Takatsuki, Karen McGillicuddy

Junya Sawa is an ordinary man - a modestly successful bank employee in Tokyo. But that isn't the life he wanted for himself. In the eight years since he graduated from high school, he's been unable to forget the man who could have changed his life - Uzuki Kobayakawa, the heir to a yakuza dynasty in Tokyo. Now, brought together by chance once again, he's forced to face the choices he made in his youth that tore them apart and to decide whether their differences will keep them apart forever.

Now reunited after an eight-year separation, Junya Sawa, a young bank executive, and Uzuki Kobayakawa, heir to a yakuza gang leader, have resumed their relationship in Tokyo. After betraying Uzuki's trust when they were teenagers, Junya swears never to make the same mistake again. Unknown to them both, however, shadowy forces are at work in the Koryu Alliance, the yakuza gang run by Uzuki's father. When Junya is kidnapped, will Uzuki be able to save him?