I'm looking for manga recommendations with a seme like in Katsubou no Manazashi or Ore ni Koi Shite Dousunda.
Those are the only examples I can think of right now.
He doesn't have to be older though. Just intimidating looking.
NO BARA (not my cup of tea)

Any suggestions? 😁

Here's a couple to get you started:

Kyou, Hana no Gotoshi, Trigger, Heart Strings by AKIRA Norikazu

Bi no Isu; Choroize Jigoku (oneshot) by IKE Reibun

Boku no Shiru Anata no Hanashi

Like as the Time Will Come When it Will Rain

Dakishimetakunai by NAONO Bohra

Thank you for those suggestions but I've already read those. Anything else you can think of?? 🙂

Viewfinder maybe?

also, could i ask where your avatar came from? 🙂

Ah, damn. I've read Viewfinder too! >.<
It's a Loveless icon I found on Google. I don't know who made it. I just thought it was funny and cute. 🙂

not sure if it'll fit your "scary" requirement, but i think it works for "very masculine":
Okane ga Nai
Kemono wa Ai de, Iyasareru and other works by FUJISAKI Kou