Lambo is given a simple task of giving Tsuna his lunch by Tsuna's mother, but when he bumps into I-pin, who was carrying a box of nitroglycerin, a mix up causes things turn for the worse. I-pin realizing the mix up comes to school and holds two exact boxes. Lambo makes fun of her for mixing up the boxes causing her to become embarrassed. She becomes a bomb but is thrown away by Tsuna in Dying Will Mode. One of the boxes drop and Tsuna catches it, and finds it to be his lunch. Later, Bianchi suggests that someone be Lambo's babysitter. Reborn holds a contest and whoever makes Lambo smile will become Tsuna's Right-hand man in the Vongola Mafia. Gokudera, Yamamoto, Ryohei and Haru fails and Tsuna is declared the only suitable babysitter. Tsuna comes home and see's Shamal there holding the box of nitroglycerin and shaking it dangerously side to side mentioning how he found Tsuna's "lunch" hanging on a tree.