The Scarlet Birthday - S1.E9

Tsukasa's photo of Jun'ichi and Yuuhi from the Cultural Festival comes in first place as Best Amitié. Minato convinces Yuuhi to help with Jun'ich's surprise birthday party by getting Jun'ichi's present, but Yuuhi has a difficult time choosing a gift. She ends up sneaking into Jun'ichi's room for some clues on what to get him and discovers Jun'ichi's stash of dirty magazines. While looking through the magazines Yuuhi is caught by Minato and confesses her difficulty trying to find Jun'ichi's gift. Minato offers to let Yuuhi bake the cake instead as her present to Jun'ichi. The next day at his party Jun'ichi receives many strange birthday gifts from friends and family. Afterwards Jun'ichi finds the cake Yuuhi baked and everyone tries a piece. The cake did not turn out very well, but Jun'ichi tells Yuuhi that it is delicious because she baked it for him. Minato begins to feel jealous.