Ep. 31: Sakuya visits Nagi, who seeks to prove her sibling skills by finding lost children on her estate.

Sakuya visits Nagi, who takes offense to being called a brat and orders Hayate to find lost children on her property to prove she can be a better sister. Hayate returns with Itsuki and Shunji, allowing Nagi to play with them while her SP searches for their parents. Sakuya suggests they go outside, causing the children to hug her. Suspecting theft, Sakuya catches the kids attempting to escape with a briefcase. Worried for Nagi, Sakuya warns Hayate that the truth will hurt her. The children are stopped by robots, which Sakuya orders destroyed. Hayate saves the boys, and Sakuya lets them keep the briefcase as a souvenir. Later, Kirika sends Mini Yon, who challenges Hayate to a Mini 4WD race.

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