First Mission: This is Snake. No One's Responding - S1.E4

When Nagi goes to school, she forgets to bring her lunch and Hayate offers to bring it to her. Once he gets to school, he is stopped at the front gates by a teacher (Yukiji) who thinks he is an intruder. Hayate eventually gets into the school, but the teacher continues her pursuit. Once inside, Hayate meets the student council president of the school, Hinagiku Katsura, for the first time, and helps her down from the tree she was climbing. As a reward, she brings him to the top of the Student Council tower so that he could see from the terrace. Yukiji, who is still searching for Hayate, finally finds him there and ends up fighting Hinagiku. After taking Nagi's bento box from Hayate, she jumps onto the railing of the terrace only to get blown off by a breeze. Hayate promptly rescues her, which ended her hostility to him. In the process, however, she had thrown Nagi's bento box onto to ground and spilled its contents.