From Attractive Fascinante:
1-3) Kazuma, a yakuza, got shot and was saved by the heir of a tea ceremony family, Shibata Yukihiro. Yukihiro, being the illegitimate son, never allowed himself to ask for anything. Kazuma was the only one that Yukihiro had wanted to protect even though the burden that Kazuma carried was too dangerous. What should they do? A very in-depth story…