The parents were going on a long trip. The protagonist was told that during the meantime, he will be living with his mother's acquaintance and be taken care by her.

While the protagonist was dissatisfied with the decision made arbitrarily, once he was invited by the beautiful mother and daughter pair, his feelings were completely blown off and changed into delight.

While spending his days full of excitement, he felt something like a secret desire among the two and decided to pursue them.