@Trippersigs22
He's LITERALLY her slave, how is that not simping?
Simp = "Someone who does way too much for a person they like"
Does he even like Kyouka?
Hasn't he clashed with Kyouka's personality multiple times already and acted on his own. When Kyouka tried to chase one-horned instead of helping her team, he decided to help the team and Kyouka later regretted her hotbloodedness.
When they were out on vacation, he managed to convince her to stop by an ice-cream store to enjoy the little things even though all Kyouka could think about was work.
Doesn't he have his own reasons for being in Mato? Kyouka's not the reason he's staying in Mato. He's got other desires and goals. Before Kyouka it was to be someone important and relied upon. After finding out about his sister it changed.
I'm starting to think that people who can't actually make a specific complaint about a character will just throw the word simp around if the character's personality isn't hotblooded shounen.