Yoshii Shieru

Yoyogi Johnny is a high school boy who gets on the nerves of his strong-willed girlfriend by spending his time loafing around the school squash club with its eccentric members and meeting his childhood friend Kagura, a recluse. His attitude changes when new girls show up in his world: Deko, a full-throttle passionate new squash player who inspires him to train, and Izumo, a country girl living in Tokyo and working part-time at a used book store. Little by little, Johnny’s daily life changes with romance, friendship, club activities and a squash team competition.

She looks super competent at work but has no idea what she's doing. He seems like a mess, but he's great at his job. Together — they make quite a team.