I'm a Behemoth, an S-Ranked Monster, but Mistaken for a Cat, I Live as an Elf Girl's Pet, Vol. 5 (manga)

Stella-the former dragon turned cute girl-has joined the party! Given that she charges full force at any enemy she sees, though, having this tomboy around might be more trouble than it’s worth...especially after her totally one-sided love for Tama only grows stronger and more jealous once she sees Aria getting all lovey-dovey with him. Meanwhile, a tantalizing personal request for the party’s services arrives in recognition of all their recent achievements. Stella gets hyped up for her first real adventure-but none of them know what truly lies in store on this quest...!