The Person I Met In-Game Was Actually My Big Sister.

“Nee-chan!?” “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 the other was in fact their own sibling!? These are complicated feelings for sure… and rather hard to accept! (Source: Kadokawa, translated)