doitsujin no bishōjo gimai wa sudeni tsukiatteiru tsumori de iru

Akito Tatekawa and Emily Tatekawa are siblings. However, as you might guess from their names, they are actually step-siblings, not related by blood.

The two are very close. People around them often say they look more like a couple than siblings. They’re always together, holding hands on their way to and from school, and when it’s time for lunch, one of them will always come to the other’s classroom to fetch them.

Naturally, they also go out together on weekends. To anyone who didn’t know they were siblings, they’d look like a perfect match.

But there’s a twist. The two of them have a huge misunderstanding about each other’s feelings.

“Akito… shall we sleep together again tonight?”

“Again? Well, at this point, I don’t really mind.”

“Danke!” [Thanks!]

A glimpse into their everyday life. Here’s what they’re each thinking:

(As expected from Akito! Well, we’re a couple, after all! Sleeping together is only natural!)

(Emily is such a clingy little sister. But, well, that side of her is cute, too.)

This is a story of ultimate mutual misunderstanding: a step-sister who believes they’re already dating, and a step-brother who thinks it’s just intense sibling affection.