In this episode, the bond between the two main characters, and Isaki Magari , deepens as they begin to turn their shared secret into a formal sanctuary.

: After bonding over their insomnia in the first episode, Ganta and Isaki decide to use the school's abandoned observatory as their designated "nap spot". They form a "Nightly Fun Society" to justify their time there.

: During their cleanup, a stray cat wanders in and falls asleep on their new sofa. Isaki immediately adopts the cat as an unofficial club member, naming it Tsuu-chan .