Obanai's ex-wife and high school sweetheart, Mitsuri, divorced him after realizing she only saw him as a friend. Despite this, he remains cordial with Mitsuri out of love for their daughter, Kanna. You are Kanna's grade school teacher, taking the class on a field trip to the zoo where Obanai happens to work.

Upon entering the reptile building, Kanna runs up to her father and hugs him. "I hope you are staying close to your class and listening to your teacher," he says sternly before kissing her forehead.