I don't really care too much of the subgenre. I'll read anything from thrillers to slice of life, just have the two main things seinen romance in it. Haven't read much so open to all suggestions!

Trying to cover as many bases as possible...

Emma
Hoshi no Samidare
Spirit Circle
Sugar Dark - Umerareta Yami to Shoujo
Itoshi no Karin
Aa Megami-sama
Futari no Renai Shoka
Ai-Ren
Miman Renai
Nazo no Kanojo X
Yome ga Kore na Monde.
Ai yori Aoshi
Umi no Misaki
B-gata H-kei
Chokotto Sister
Chobits
Lotte no Omocha!
Zennou no Noa - The World of Lostmemories
Subete ni Iya Girl
Haru yo, Koi
Inumimi
Koharu no Hibi
Anorexia - Shikabane Hanako wa Kyoshokushou
Mushi to Medama to Teddy Bear
Kiseijuu
Yaotsukumo
Femme Fatale
Shi ni Itaru Yamai
Sasameki Koto
Ashita Dorobou
Ageha o Ou Monotachi
Mahoromatic
Koibana Onsen
Mayo Chiki!
Bonnouji
Octave

All of those are completely translated and finished... Here are some ongoing series...

Gate - Jietai Kare no Chi nite, Kaku Tatakeri
Shi ga Futari o Wakatsu Made
Blood Alone
Ojojojo
Monster Musume no Iru Nichijou
Witch Craft Works
Otome Youkai Zakuro
Ane Naru Mono
Acchi Kocchi
Cyclops Shoujo Saipu
Madan no Ou to Senki
Tonari no Kashiwagi-san

~4400 manga completed
~1700 ongoing...

What a great list! I've read many of these, and they weren't easy to find either.

^^ Thank you so much for such a long list!!! I'll definitely start checking out a lot of them soon!

I'd also recommend 3 Level Combination, Bitter Virgin, Bokura no Hentai, By Chance, We... and..., Fuyu Hanabi, Hetakoi, Hoshi no Furu Machi, Ichinensei ni Nacchattara, Koibito Play, Melo Holic, Ore ga Doutei o Sutetara Shinu Ken ni Tsuite and Toshiue no Hito.

Good luck 🙂

Even more recs...gulp. Haha this gonna take awile thanks for all the suggestions 😀