Mr. Love Letter is an episode of Mr. Young.
Echo finds Adam's love letter in Finnegan High's time capsule and wonders who wrote it. When Adam is too shy to admit, another student named Jared takes the credit for it, and Echo falls in love with Jared. Adam must prove that the Jared is lying about the letter to prove Adam wrote it himself.
Weevils are eating up lunches at the cafeteria, and Principal Tater tries to find the source to get rid of the pests, but Ivy does not allow it since the weevils are eating her clothes and making them "better".