I'm Glad They Kicked Me From the Hero's Party... but Why're You Following Me, Great Saintess? - Vol. 1 Ch. 1.2

[MangaDex]

 

[Coldlight]

So he has a unique skill after all, and yet he made no effort to tell anybody. He even went to some lengths to conceal this knowledge from them. So he allowed misunderstandings to fester and now he's surprised he got kicked out?

I'm very sure this dragon will become a dragon loli like most stories of this kind.