Responses
Most of them are tsunderes, or just keep their feelings under wraps
If you’re looking for more, search in tags or in lists for: tsundere uke
YoonSora gave a good list of some other manga with those kinda ukes
The type of uke I'm looking for is quite specific and difficult to describe, but here are some examples:
Azusa in Caste Heaven
Yoshiaki in Katamuku Karada
Masahiro in No Color Baby
Shigo in Kuroneko Kareshi No Nakasekata
Ai in ROUGE
Momo in Yatamato
Yashiro in Saezuru Tori wa Habatakanai
Woojin in Escape into Oblivion
Minjae in Chew and Swallow
Jermey in A Cruel God Reigns