Rentarou and the girls infiltrate the Hanazono residence to rescue Hakari. Rentarou tries to get Hakari's attention by throwing a ball at her bedroom window so she can grapple down with a rope, but he misses the window and the ball lands in the paws of the cat of a wealthy family. They lose the ball when a pair of security guards spot the cat and try to coax it inside by playing with the ball. Nano deduces from the cat's presence that the house has a pet door, through which she manages to unlock the door by flinging pebbles at the lock through the pet door.
Entering the mansion, the group is suddenly confronted by the dog of a wealthy family. Everyone except Shizuka makes it outside, with the latter laying herself down in front of the dog so the others can get through. The dog begins licking Shizuka, falling on instincts to protect weaker creatures. Kusuri slips a sleeping drug to Shizuka to subdue the dog, but Shizuka misinterprets the instructions and drinks it herself. But the dog knocks itself out by licking Shizuka's face.
After awakening Shizuka with the neutralizer, the group comes down to a long hallway. Before they can move forward, though, the cat of a wealthy family triggers an alarm, revealing that the hall is lined with infrared sensors. Kusuri offers up a dose of eyedrops for seeing infrared light, which she was planning to submit to an overseas pharmaceutical company as part of a job application before deciding to rescue Hakari. Rentarou puts the drops in his eyes and quickly sees that the entire hallway is stacked top to bottom and front to back with infrared sensors.
Tropes:
- Contrived Coincidence: Subverted. Rentarou finds it too convenient that Kusuri had a very specific drug for a very specific plot development, even expressing doubt about the situation going over well with the readers. However, it’s soon revealed that Kusuri made the eye drops as part of a job application before she heard about Hakari’s situation.
- Eye Pop: Karane does one when asking Nano just how she managed to open the door.
- Oh, Crap!: Rentarou's reaction when he realises that Shizuka is still trapped in the house with the dog. He has the same reaction when he sees just how many infrared sensors are in the hallway.
- What You Are in the Dark: Kusuri could have easily stayed silent about her drug that enables people to see infrared light and mailed it in to the company she wants to work for. She doesn't even hesitate before giving it up so that the group can rescue Hakari.
