Solo el manhwa está indexado; sin novela conocida aún.
Fukuzatsu na Kyoudai no 4koma A Complicated Older Sister and Younger Brother 4-Koma
También conocida como: A Complicated Older Sister and Younger Brother 4-Koma · A Complicated Sibling Relationship 4-Koma · Fukuzatsu na Kyoudai no Yonkoma · The Person I Met in the Game Was Actually My Big Sister · The Person I Met In-Game Was Actually My Big Sister · ゲーム内で知り合った人が実は姉弟だった · 複雑な姉弟の4コマ · Fukuzatsu na Kyoudai no 4-koma
"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!