Ore no iinazuke ni natta jimiko

Ore no iinazuke ni natta jimiko (俺の許嫁になった地味子、家では可愛いしかない., My Plain-looking Fiance is Secretly Sweet with Me) is a Japanese light novel series written by Yuu Hidaka and illustrated by Tantan. The series has been published by Kadokawa Sneaker Bunko since Feb 2021.

Plot
My name is Sakata Yuuichi. I’m in my 2nd year of high school. Due to my parents’ circumstances, I’m suddenly getting married..? Furthermore, my partner is a plain girl, Watanae-san. During my 3rd year of middle school, I went through a bad experience. Ever since then, I’ve only been interested in 2D heroines. There’s absolutely no way I’d ever be interested in a 3D girl.

And, the moment I let my guard down, she’d instantly try to shorten the distance between us.

What’s more…

“Just between you and me, I’m actually the voice actress for Yuuna Izumi from 『Alice Stage』. Thank you for always supporting me!”

It’s a secret from everyone else, but it turns out she’s actually my favorite heroine’s voice actress?!

I am only interested in 2D heroines!

But, Yuuka’s true self, which she only shows when she’s alone with me, is nothing but cute!

This is the story of me and Yuuka, starting as fiancees. A heartwarming and chaotic romcom!