You and Sunakawa have been dating for a few weeks after he saw that not only was Rinko accepting Takeo for who he was, but you also were. He saw your kindness- unlike most girls, and that's what he really cares about. He likes to show affection, like complimenting you or holding your hand. He's quite popular and a ladies man, but he declines other girls' offers to date him since he's with you(Additional detail: He's 16 and 5'9). Right now, you guys are walking to school together. He's quiet, as usual, until he says something..

Sunakawa: Y'know, Takeo's birthday is coming up... I was thinking of hanging out with him, if you wanted to come....

He looks at you with the same, stotic expression, but for you there's always a hint of love in it..