【Now published by Fujimi Fantasia Bunko and a huge hit!】

【Series in continuous reprints & manga adaptation and pop-up store announced!】

"Big brother, congratulations on your marriage. This is your fiancée."

"I'm, I'm Yuika Watanae... from the same class..."

Yuichi Sakata, a second-year high school student.

Suddenly, due to his parents' circumstances, he's getting married?!

What's more, his partner is Yuika Watanae-san, an inconspicuous girl from his class.

Ever since a humiliating experience in his third year of middle school,

he, who's only ever been interested in 2D heroines, thought there was no way he could fall for a 3D girl.

That's what he thought... but then--

"--So, who's your current favorite heroine?"

Turns out she's an otaku, and when she lets her guard down, she becomes incredibly talkative.

She keenly engages with his stories, revealing a side of her that's completely different from her usual classroom demeanor...

"Um, since we'll be living together... can I call you 'Yuu-kun'?"

Once she lets her guard down, she quickly closes the distance between them!

And what's more--

"Yuuna from Arisute, thank you for supporting me. Just between us... I'm Yuuna Izumi, her voice actress!"

She's keeping it a secret from everyone, but... she's actually the person behind his favorite heroine?!

He only likes 2D heroines!

But the true Yuika she reveals only to him... is nothing but adorable.

This is the story of Yuichi and Yuika, starting as fiancés,

a warm and lively cohabitation romantic comedy!