The labels have the character's name followed by 受 (uke), which means being the receptive or passive partner, or in BL slang means the bottom. Most underrated organizational system ever by the way. Please show this to anyone who claims that "unwoke" Japan doesn't "shoehorn queerness into everything".
Same sex activity is a tradional part of Japanese culture. It is almost as gay the Helnistic past. So it makes sense chuds will see two girls kissing as tradion expects and think nothing of it