- Chinese episode name: 小心记事本 ("Xiǎoxīn jìshì běn")
English translations: "The Important Notebook" (Miao Mi dub), "Careful Notebook" (translation of Chinese name)
Careful S., who is still coping with the death of Kalo, writes a story in a notebook that Happy S. later finds. In the story, Careful S. is the one who did the Heroic Sacrifice, with Kalo coping with his loss.
This episode contains the following tropes:
- Behind the Black: Kalo visits the hospital and somehow doesn't notice the doctor is being held captive until the crook behind it is revealed on-screen.
- Call-Back: The episode's plot is directly set up by Season 7 episode 50, "God of War Legend (Part 4)", which features Kalo sacrificing himself to save Planet Xing from an army of invaders.
- Catapult Nightmare: Careful S. catapults out of bed after he dreams of Kalo's death at the beginning of the episode.
- Dream Intro: The episode starts with Careful S. having a dream recounting what happened to Kalo.
- Gray Rain of Depression: It starts to rain when Happy S. finds Careful S. outside, still sad.
- Improvised Umbrella: Little M. is outside the Supermen's house with Big M. and uses a giant leaf to keep them both dry.
- Past Experience Nightmare: The dream Careful S. has at the beginning of the episode is about Kalo and his death.
- Role Swap Plot: The story Careful S. wrote in the notebook is one big What If? for if he sacrificed himself instead of Kalo. Kalo himself goes through the same emotions Careful S. does after the fact.
- Survivor Guilt: Happy S. reads the story Careful S. made and quickly notices it's a reversed version of the incident with Kalo. When Happy S. finds Careful S. standing sorrowfully outside, he thinks Careful S.'s story is the way he wants the event to have turned out.
