"Because you're like family to me... I can always be by my big brother's side,"

Kotone mutters sadly as she steals Kazushi's lips.

As the sports festival draws to a close, Kazushi learns the girl's true feelings in an empty classroom bathed in the sunset.

"I don't mind being second... just look at me for now,"

Kotone says as she tries her best to convey the words, grabbing Kazushi's hand and making him touch her chest.

With his heart beating painfully fast, Kazushi comes to a conclusion...

"My swimsuit is... gone!?"

Kotone's bikini falls off the moment she slides down the water slide at the pool.

Kazushi quickly hides her chest and runs into the storehouse, but the sight of the two of them alone topless is too stimulating for a boy of his age...