Kore Mo Shigoto Desu
6/10 Nozomu from sales is always coming to system engineer Teppei with projects that have ridiculous deadlines. No one else will do them but Teppei, and it's because he's always had a secret crush on Nozomu. One day, Teppei decides to blackmail Nozomu into getting intimate with him
Himono, Tokodoki, Shanairen'ai
7/10 Kimura is well-known for being a perfect man?, but he has a secret that no one knows. In truth, he is a man that has withered like dried fish, or what you call- a devitalised man! With his worn-out shirt and pajamas, he spends his time in his messy room with his cat and a can of beer. However, after a drinking party, he spends the night with his cheeky subordinate, Nishiguchi, in a hotel. Will that be the end of his peaceful life?! Older uke, young seme. 20 years age gap
Sayonara Alpha
Alpha and omega, fated pair, age gap- 9 years, I'm pretty sure Chika mentioned it I don't remember in which chapter, so they were 8 and 17 years at the beginning and 19 and 28 at the end 8/10
Anata wa Iyarashii Hito
7/10 Responsible, no-nonsense police officer Munakata is known for his exceptional skills and high arrest rate. His perfection is the the envy of all. But, Munakata has a secret he can't tell anyone: his body's filthy longing to be humiliated. Unable to repress his flagrant desires, he indulges in risky behavior whenever he's alone at night.
Caligula no Koi
https://rosesquadscans.aishiteru.org/reader/series/caligula-no-koi/ On ch 6
Boku no Omawarisan
On ch vol 3 ch 6 So cute
Hiren