The World God Only Knows, Volume 11 (The World God Only Knows #97-106)

Hinoki Kasuga has become possessed by a level 4 spirit that was within her, and Keima is the only one who can stop it. Taking Kusunoki Kasuga with him, he enters Hinoki and defeats the inner monster. After the Level 4 is sealed by a mysterious figure, the runaway spirit squad cleans up the aftermath of the level 4 spirit's rampage. In the next or two days, Elsie feels down, for she couldn't do anything during the level 4 spirit. Seeing this, 2-B Pencil, especially Ayumi and Chihiro asks Keima to cheer Elsie up. Though at first he does not comply, he agrees to go and have a "date" with her. The "date" does not change the sister-brother relationship of the two, but it does cheer up Elsie.