Ep. 8: Anzus und Rihos Scheindatum führt zu unerwarteten romantischen Forschungen

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By chance Anzu encounters Arisa who turns out to be Tsukasa's older sister worried about Tsukasa's living arrangements, which makes Anzu feel guilty since Tsukasa's problems were caused by Riri. Arisa explains Tsukasa lives alone because of their father, but she is happy Anzu is making Tsukasa more like his old self. Arisa successfully convinces Tsukasa to continue living with Anzu indefinitely. Riri is disappointed Anzu still has no boyfriend. Deciding she needs more research into romance Riri bribes Anzu to take her on a mock date and transforms into a boy named Riho. During their date at the movies Tsukasa sees them holding hands but Riho simply claims he is Anzu's other cousin, human Riri's twin brother. Riho selects a romantic movie but realizes it doesn't actually inspire romance, it just makes girls cry and boys bored. While sharing milkshakes they encounter Hijiri whom Riho tries to antagonize by pretending to be a rival for Anzu's attention. Anzu angrily drags Riho away to continue with typical date activities. Eventually Riho decides he has enough research for another scenario and Anzu swears to defeat it. Riho suddenly kisses Anzu on the cheek, flustering her, until she realizes Riho only did it to traumatize Junta who was right behind them. (Source: Wikipedia)