- Actor Allusion: Indirect example in Episode 12, where the audience sees that one of Chihaya's cosplay outfits is the trademark white sundress of Menma from Anohana The Flower We Saw That Day — which happens to be the Star-Making Role of Ai Kayano, Lucy's voice actress.
- Cultural Cross-Reference: Pinned on Hasebe's bedroom wall in episode 8 during his Nightmare Sequence is a painting of Taylor Swift's Speak Now album cover.
- Executive Veto: Takatsu originally wanted Kanon to have bunny-ear-shaped hair for Strong Family Resemblance. The editor vetoed it.
- Relationship Voice Actor:
- Lucy's dad and Hasebe's dad used to play tennis for different teams.
- Ichimiya and Lucy are Yukiatsu and Menma.
- Ichimiya and Miyoshi battled Chihaya and Lucy in Fairy Tail as well as Lucy's dad. Joining them is Hasebe's dad.
- In Say I Love You, Kaoru Hasebe is Lucy's mother while Ichimiya is Lucy's love interest.
- Write What You Know: Karino Takatsu worked in a ward office before she became a mangaka.
- In the Omake of Volume 1 of the manga, the author revealed that the reason why Kenzou Momoi appears as a stuffed bunny is because she wanted a Series Mascot and a boss character and ended up combining both together!
Trivia / Servant × Service