Keith Disappeared... Part 1 (S02E09)

Catarina is feeling thrown off by her sudden awareness of Geordo, so when she's back at home during a break from school, she spends her time working her fields for a change of pace. When she's done, she heads to Keith's room to show him the vegetables she's grown... but Keith isn't there, and instead she finds a letter in his room saying that he's running away. (Crunchyroll)