Bokura ga ita Season 1 Episode 21 Episode Twenty-One ( Air Date 2006-11-20 ) Genre Animation, Drama category. Overview "Nanami's parents are going to a wedding on the weekend, so she takes this opportunity to invite Motoharu to sleepover. On the day Motoharu's pretty excited about the whole thing when all of a sudden he receives a call from an upset Yuri. So instead of meeting up with Nanami he goes to be the one at Yuri's side. Meanwhile Takeuchi is on a date but he can't seem to get Nanami of his mind.".