Yankee-kun To Pantsu No Ouji-sama
Tsundere delinquent Kachidoki is secretly dating the school's "prince", closet-pervert Suou. Kachidoki is ostracized by his peers for being different, and Suou decides to protect him. Suou moves abroad for college, promising to marry Yamato when he returns. Attempted rape from Suou's brother
Renchin!
Ostracized and lonely, Kami is sure his only good quality is his cooking. When foodie news reporter Waki moves in with him after a house fire, he teaches Waki how to taste flavors, and Waki strives to teach him love
Kiss Shite Yowamushi-kun!
[There isnt any shotacon, i just noticed that tag... the last couple has an age gap but its not underage afaik?] 1-2 Sawa is a college student, who was confessed to by Ono, a high school senior. They work together at the same bookstore, and Sawa might be falling in love with Ono's adorable personality 2 - Yoshihiko is a 31 year old man, who lives alone and wants more zest in life. And then he meets the adorable ghost boy who lives in his house 3 - Hidaka meets and starts dating Leo, a transfer student who moved into his class. It turns out Leo is also the same boy Hidaka relentlessly bullied as a kid (and Leo knows) 5. Kuro is a neko boy, who's master is always thinking about a boy just like him, Akira. Kuro thinks he's a replacement, and is bitter. But that's not it at all
Retsujo Love Cross
Leo goes on an onsen trip with his (unromantic) boyfriend, where he meets and has sex with a man named Ryouta. It was only a fling, but then Ryouta shows up at Leo's company as an associate (and becomes his sex friend/fake boyfriend, because of Leo's stalker ex)
Following Namsoo To The Bathhouse
I'm not rereading this But from what i remember, the mc gets a massage from a bathhouse guy, gets hot and bothered, and comes back a bunch to see him. And then they have sex? And then there was like weird drama plot that i don't remember?
Trap in a Skirt
Aoi was forced to watch a woman have sex when he was a child. The trauma left him emotionally detached and wishing to "feel good like a woman." His classmate, Takano, is to be struggling with his own sexuality, and only wants Aoi to love him back, despite the other boy's inability to connect to others
Ookami Shounen To Hamu No Hito
Yuudai is in the closet, and puts up a straight pervy act for everyone, even though he has a crush on his friend, Kimikazu. But after a party, Kimikazu fucks Yuudai, who can't break past his fake persona of a straight boy. He pretends to not remember in the morning, and they lose contact after that (but meet again in Tokyo years later)
Itoshi no XL Saizu
Yamamoto goes to the sake research club of his campus and ends up meeting (and having sex with) Kobayashi, a hot guy who has a huge dick and hasn't had sex -- because girls are afraid of it. Yamamoto offers to help him out, and gets fucked so hard he passes out. This is the beginning of their love story.
Oku made Furetemo Ii desu ka
Natsume is very shy, reserved, and blushes easily. He starts to date his outgoing coworker, Yuuki, who is always forcing a laugh and smile. Natsume learns that Yuuki is ostracized by his family, and wants to let Yuuki know how much he loves him
Yajuu ga Koibito