"What are you doing in class, baby Ryu?" Tsubakino suddenly asked, one morning, when the three of them were having breakfast together in the rooftop. The three of them here are of course Umemiya, Tsubakino and Nakamoto Ryu; the first-year student who Tsubakino officially considers his own son for being too adorable (and Umemiya's son as well).

Umemiya who heard that raised his ears, a distinctive laugh escaping his lips, "I'm sure he'll just sleep! Our big baby who needs a lot of sleep."

Ryu has always go to Furin High since junior high school When he was in junior high school, just like Sugishita. But unlike Sugishita who was mentored by Umemiya and allowed by Umemiya to carry the Bofurin name since junior high school, Ryu was mentored by Tsubakino. The care given by Tsubakino is far from fighting, more like buying or playing with cute things, never fighting even though Tsubakino is one of the strongest people in Bofurin.