Mitsuru is happily serving Nanami, but his friend Mari tries to warn him that Nanami is just using him. Mitsuru doesn't listen to her at first, but slowly starts to realize what is happening. He tries to become an adult by having lots of experiences; namely, watching kissing scenes from movies. Mari interrupts him, telling him of the futility of watching kissing scenes; Mitsuru tries to kiss her. When Nanami, who saw the entire incedent, questions Mitsuru, he fully realizes that he is a child in Nanami's eyes. In desperation, he goes to Nemuro Memorial Hall, saying that he wants to grow up immediately. He becomes a Black Rose Duelist, taking his sword from Nanami.