Older straight seme x younger gay uke PART 1

Disclaimer: This story is based on True Story. I include this one on the story because of stronger sense of yaoi and/ or shounen-ai. I hope having more yaoi that represents love stories of LGBTQ+ representations like this one.

Disclaimer: Someone in the comment replies that the seme is older, so I will consider this one. In terms of sexuality, the uke is an OPENLY GAY PERSON. For seme, he is a perfect example of 'I am only gay for you', so yeah.

Disclaimer: Seme's sexuality implies he is straight because uke thinks that their "doing" is seme's first with a guy. Aside from that, a side character said that the seme brings over girls before the uke, which leads he seems bi, but that is not the case. For uke, no doubt he is GAY AF .

Disclaimer: Not sure whether the seme is straight, demisexual or asexual

Spin-off: Never Understand/Out of Control

Chapter 1-3.1
Sequel:
1. Kobi No Kyoujin
2. Bi No Kyoujin: Smoke

Prequel: Bi no Isu
Sequel: Bi No Kyoujin: Smoke

Prequel:
1. Bi no Isu
2. Kobi No Kyoujin