Makoto's doting sister Tsubaki finds out that Makoto hasn't kept his secret from Ito! She threatens to tell Makoto's father unless Makoto and Ito's homeroom can win a school competition. Then Makoto accompanies the entire Miura household to their ancestral home to meet Ito's eccentric, sharp-witted grandmother. Little does Ito know that her past will catch up with her there...literally!