When the MC’s teacher does a home visit to his house, she immediately falls for the FMC, so she begins flirting with her and trying to seduce her.
When the MC leaves the room, the teacher goes to kiss the FMC and they start having sex. While this is happening, the FMC thinks that she might fall into becoming a lesbian, but then the MC walks in on them and the chapter ends.
The teacher is never seen again after this and the FMC doesn’t question her sexuality again either.
Philia comes home expecting to find a present from the MC, but she mistakenly thinks it’s a girl (Mary) that’s unconscious on the bed that the MC saved earlier without telling Philia.
Since the MC isn’t home to clear up Philia’s misunderstanding, she ends up succumbing to her desires and curiosities about human girls and has sex with Mary for the whole day.
The MC comes home at the end to find that Mary had completely fallen for Philia.