anybody know (idk if it was a webtoon or not) but like the boy thought the other person wa...

anybody know (idk if it was a webtoon or not) but like the boy thought the other person was a boy but she was really a girl. they start hanging out or whatever and both the boy and girl starts to like each but the girl sister actually has ac crush on the boy. and then the girl sister was gonna ask the boy but it was just to push her sister to admit the feelings she had. OK that's all I remember im sorry if its confusing ╮(￣▽￣)╭