Yubisaki Kara Honki no Netsujou ~ Charaotoko Shoubou-shi wa Massuguna me de Watashi o Daita ~,指先から本気の熱情～チャラ男消防士はまっすぐな目で私を抱いた～,Fire in His Fingertips: A Flirty Fireman Ravishes Me With His Smoldering Gaze
I still very much miss mihyang. I'm sad she's gone but she's where she wanted to be, but MC is with childhood friend who loves him. So he'll be alright. Not sure about Lee sua and Joomi... But this is an alright ending
Honestly speaking this is the best of its genre that I've read. I've read a bunch of seinien and it's mostly just a guy banging a bunch of chicks and collecting a harem of woman and proceeding to have sex with them all. But this has one of the best plots of seinien I have ever read. You should totally read it, and it's not NTR, the MC has a girlfriend but it's not love.