Responses
There's one in ch. 5 of this manga... but it's the uke using it to protect himself from being devoured by the seme: http://www.mangago.zone/read-manga/onsen_tarzan/
This manga from the same author also features a chastity cage, but they use it as swimwear... hahaha!
http://www.mangago.zone/read-manga/oshioki_gakuen/
Any manga where the seme/uke is in a chastity cage?
ヾ(☆▽☆)(I know its weird but it turns me on like an omega in heat)
ლ(´ڡ`ლ)