Sofure Buka!
Two coworkers agree to become sleep partners, but then feelings start to develop. (Main story) Chapter 5 - A man's unrequited love for his best friend, who is getting married. Good news about chapter 5 - it has its own manga with a happy ending and new love! Plus the friend has a cameo and is a super great guy. Two men who have been dating a few months finally have sex.
Renai Nante Yurushimasen!
If Junjou Romantica and Soredemo Yasashii Koi wo Suru hooked up and had a baby manga, it'd be this. Kirishima, a guy with a massive brother complex is the secret love interest of his gay best friend, Toudou, who accepts the love as unrequited and, for a time, appears to have taken an interest Kirishima's little brother Hokuto. But like Onoda in Soredemo, when Kirishima learns that Toudou has been in love with him for many years and wants to end their friendship, he refuses to let Toudou out of his life and insists they try to date. Sweet. Not my favorite but endearing, and it didn't make me cry.
Haikyu!! Dj - Swallowtail Butterfly
Kuroo has watched Kenma go through man after man, until he meets a tattoo artist and has a swallowtail butterfly tattooed on his lower back. This author is fantastic.
Haikyu!! Dj - Happa No Yousei Tooru-chan To Hajime-chan
**This is marked complete but it's not finished!** Iwaizumi comes to realize his feelings for Oikawa, but rather than do anything about them, he devotes his energy to a fairy who has been with him since childhood that he's recently become able to see.
Osanajimi ga Do M de Tsundere Nan Desu ga
Momo has been in love with Suzume for years and is heartbroken by the string of men Suzume sleeps with. So when he turns eighteen, he begs Suzume to give him a chance. This is very sweet and loving, with only a hint of BDSM. The focus is more on Suzume's internal changes and very little on the actual sex.
Retsujou
Multiple stories, including one about a boy who had been in love with his best friend so did what he could to keep girls away from him in high school, and asks for one night together for memories.
Uchi no Ani no Renai Jijou
Twelve years after he was taken in by distant relatives after his parents died, a man continues to struggle with feelings for his adopted older brother. This was an interesting and sensitive take on a delicate subject.
Yume no Kuni in My Darling
The one with the man who has been in love with his spacey novelist friend since high school
Yoru ga Aketemo