Yusuke Sasagawa, serious on the inside but a complete playboy on the outside, was being 'kept' by a yandere.

However, Yusuke secretly admired Student Council President Sayuki Amane. Known as "The Invincible Student Council President," she found frivolous men completely out of the question.

Sayuki, the extremely serious daughter of Amane Industries, and Yusuke, poor and looking like nothing but a playboy, were as incompatible as chalk and cheese. Yet, a certain event sparks a friendship between them.

However, as Yusuke resolves to make Sayuki his girlfriend, his yandere childhood friend, Rina—who understands him inside and out—begins to obstruct his efforts relentlessly.

"No matter what, I will become someone who can naturally ask Amane-senpai, 'May I help you?'"

To make this impossible love possible, Yusuke endures hellish torment, single-mindedly striving and challenging himself. He overcomes appearances and prejudice, and eventually, their love blossoms. This is a romance novel of immense perseverance.