If there are any grammar errors, I'm really sorry. English isn't my first language.

I'm searching for a manga used by Girls' Generation Scanlation as some sort of ad at the start of some of their chapters. It's not the one taken from Daydream Nightmare. It has a pink background with two guys kissing on the left and the information on the right. I think they are wearing some kind of school uniforms but I'm not sure. I would be really thankful if someone could tell me what manga it is because the artwork looks great. Thank you for anyone willing to help.

I'm Korean, but I'm not sure what you're referring to exactly. Got a link to an image or video?

that looks like a Durarara! doujin, with Shizaya pairing. not sure of the exact dj but maybe it will help

I used google image search and got this: link. It seems it indeed as piranha said.

Piranha and Lihmao, thank you both so much. At least, now I know where it came from.