Disclaimer: I am still doubtful to include this one in the list. In this case, the uke seems to be demisexual exactly, not gay since he stated that he was not attracted to both sexex unless the seme. However, part of his reflection asking himself whether he is gay. Well, I am gonna make list intended for demisexuals whether top or bottom.
Disclaimer: I am not sure whether the seme is demisexual, straight, bisexual or gay. His sexuality is not emphasized on the story. For my convenience, I will consider him as straight because a character mentions he is popular with girls and is speculating have a gf (though it is a rumour). For uke, I immediately identify him as gay because his previous love interest is his homophobic bestfriend prior to the seme.
Disclaimer: This is shounen-ai, so this is self-implied. The seme here seems straight.
This is the one-shot prequel of Saezuru Tori wa Habatakanai.
Chapter 2-4
Disclaimer: I am not sure about seme's sexuality. For the benefit of the doubt, I assume he is a straight guy being seduced by a gay uke which he was attracted to guys.
Ohigara mo Yoku