After securing a spot at Toudai, Keitaro faces a setback with a leg injury, prompting a soul-searching journey. Setting new aspirations, he joins Seta on an archaeology expedition abroad. Meanwhile, chaos brews at Hinata Lodge in Keitaro's absence with the sudden arrival of his assertive sister, Kanako, claiming management rights. Tensions escalate as a crucial letter from Keitaro arrives, triggering a scramble among the residents and Kanako. However, a dramatic twist unfolds as Seta's car accident interrupts the unfolding drama.