Hana to Ryuu is a yaoi manga series created by Kazuma Kodaka in 1993. Designed as a doujinshi, Hana to Ryu follows Ryuji Kazama, the son of a dead yakuza boss, as he struggles to maintain a peaceful existence while dealing with harmful forces all around him. Hana to Ryu takes place in the universe of another Kodaka series Kizuna, taking place 10-15 years before Kizuna.