"Big Sis!?" "Kouta!?" The two of them were enjoying an in-game romance (without knowing each other's identities). Upon seeing each other's faces at their long-awaited offline meetup... they were both shocked to see that their partner was in fact their own sibling!? These are complicated feelings for sure... and rather hard to accept! (Source: Kadokawa) --- Additional Links * [Kadokawa](https://store.kadokawa.co.jp/shop/g/g322302001578/) (Publisher) * [BookLive](https://booklive.jp/product/index/title_id/20068503/vol_no/001)