Ogami Tsumiki to Ki Nichijou.

After meeting Tsumiki on his first day of school, Yutaka decides he wants to be as self-assured as she is. But when Tsumiki invites him into her werewolf world, vowing to help him come out of his shell, Yutaka puts on the brakes. Tsumiki spends her days jumping out of windows, climbing mountains, and burying sandwiches to snack on later. Yutaka isn't used to any of that. Can he overcome his anxieties and learn to howl at the moon?

(Source: VIZ Media)