Their shared secret...is teasing! Nishikata and Takagi-san revisit the best parts of childhood as they set up a secret base and face off against each other in back-to-back challenges! And it's not just them--even the mature Houjou has a surprisingly childish encounter with Hamaguchi! Still, if one thing has grown, it's Nishikata's confidence; he's definitely going to win one of these days!