On a day like any other, Tsukasa decided to change his lifestyle habits a bit. Since he had been snacking and eating late-night meals frequently lately, he had gained quite a bit of weight...

He decided that from now on, he would eat snacks in moderation and start exercising.

Normally he might have given up quickly, but this time he was serious enough to even set up a proper plan, determined to see it through.

However!!! The problem was Kamishiro Rui, who was right beside him.

As soon as Tsukasa started his diet, Rui began to strangely test Tsukasa's resolve.

Whenever Tsukasa tried to resist snacks, Rui would prepare delicious treats, and if Tsukasa was waiting for mealtime, Rui would cook up mouth-watering food in the meantime.

The timing was so perfect that it was impossible to tell if he was doing it on purpose or by coincidence, and as the days passed, Tsukasa began to waver under Rui's interference.

And so, Tsukasa's diet and Rui's sabotage began together.

The next day... a peaceful? weekend morning began.