If you're looking for manga similar to Chii-Sui Maru 2nd Season, you might like these titles.
A manga about a private investigator that can talk to bugs, who takes on odd jobs from various insect clients.
The "whole country unification insect comedy" series centers on a male junior high school student named Baku who doesn't fit in with his class. He spends his days in the empty stairway to the roof of his school and calls it his "castle." One day while he is hanging out in his castle, Baku hears someone refer to his female classmate Kirin with the formal and rather antiquated term "dono." That someone happens to be a talking insect.
The transfer student, Yumekai, met a strange person who loves insects and a strange bizarre, strange creature, while being guided by butterflies dancing in the school.
Amano Nami is a first year high schooler with a passion for insects. She loves catching and releasing all the insects she can find, and sharing her love for insects with her friends whenever given the opportunity.