Tomokazu Mikuri finds himself in a dream world on his 16th birthday.

Mizuki helps Tomokazu study for a makeup test, but when the day of the test arrives, he is accused of making the test and text books disappear.

Nanase's younger sister, Kuyou, returns to Japan; Tomokazu finds himself facing an irate Mister Ishikari on the field playing dodge ball.

Tomokazu undergoes special training to increase his power and abilities but breaks his promise to teach Kuyou to swim.

Tomokazu and the girls go swimming at the beach; Tomokazu discovers Mizuki is transferring to a different school.

Tomokazu and the girls enjoy a summer festival; Nanase remembers when she swore to protect Tomokazu.