Shouldn't this be tagged as incest too? If my memory serves right Kamui is related to the Hoshido family by blood, unlike the Nohr family.
In the S ranks for the siblings, it's revealed that Kamui is NOT related to them by blood. Mikoto brought Kamui with her to Hoshido. In Sakura and Hinoka's S-rank supports, they admit that they knew all this time because of a letter that was given to them by their mother.
In the S ranks for the siblings, it's revealed that Kamui is NOT related to them by blood. Mikoto brought Kamui with her to Hoshido. In Sakura and Hinoka's S-rank supports, they admit that they knew all this time because of a letter that was given to them by their mother.
TL;DR: Standard H VN "Technically not blood related, so let's have an incest scene!" nonsense.