Good Luck! Ninomiya-kun

Shungo meets Mayu at his school, and learns about Mayu's condition.

Reika is introduced and gets worked up when Mayu unknowingly makes fun of her. Reika challenges Mayu to a contest for Shungo, only to lose and be blackmailed into becoming his maid.

Hinako takes Mayu out to get to know her better, while Reika attempts to get rid of Mayu by exploiting her fear of men.

Mayu attempts to help Reika with the housework, only to find a hidden passage instead. They get trapped within the passages for most of the day, only to be abducted by Ryōko for slacking off when they finally escape.

The crew go to the beach for a 'vacation', where Mayu starts getting closer to Shungo as Reika continues to try to upstage her. After witnessing Shungo inviting Mayu to watch the stars together, Reika wanders off in a depression. Shungo runs off to find her, only to meet her inner self instead. Things end with the appearance of a mysterious group of soldiers.

Shungo, Mayu and Reika are attacked by soldiers and are held captive in the house. Shungo fights back but is beaten up after being knocked out by a mysterious woman in a Tiki mask. Reika exploits Mayu's bad luck to trigger the various traps in the forest, spreading chaos among the enemy. She uses this as a diversion to free Shungo, who then faces off against the mysterious woman.