Quick Answer
Mob Psycho 100 Chapter 27 is part of the Big Cleanup Arc (Chapters 20 to 33), where the strain between brothers Mob and Ritsu Kageyama grows while Reigen Arataka stays a steady presence and the Awakening Lab and the plan against Tenga Onigawara hum in the background.
Key Facts at a Glance
- Chapter 27 sits inside the Big Cleanup Arc, which runs from Chapter 20 to Chapter 33.
- The arc centers on the relationship between brothers Mob and Ritsu Kageyama.
- Reigen Arataka is Mob’s boss and mentor and appears as a steady presence in the background.
- The Awakening Lab and the plan against Tenga Onigawara run in parallel through this stretch.
- Previous chapter: Chapter 26. Next chapter: Chapter 28.
- Sources: Mob Psycho 100 Fandom Wiki and Wikipedia. Last checked October 25, 2026.
Mob Psycho 100 Chapter 27 Summary
By this point in the Big Cleanup Arc the story has stopped introducing and started pressing. Mob Psycho 100 Chapter 27 is about the strain between brothers, and it does much of that work through small, believable moments rather than speeches.
Mob and Ritsu live in the same house and go to the same school, and still they feel like they are living in separate stories. Mob’s powers sit between them like a piece of furniture neither one mentions. For Mob they are a burden he tries to keep calm. For Ritsu they are the thing he does not have, which makes every family dinner a little complicated.
Reigen remains a steady presence in the background. He is a self-proclaimed psychic with no real powers who nevertheless gives Mob something solid: a job, a mentor and a person who treats him as more than a weapon. Next to the school plotting, that quiet loyalty feels like a different genre of story, and the contrast is deliberate.
The Awakening Lab and the plan against Tenga Onigawara continue to hum underneath the chapter. Ritsu’s choices at school and his interest in awakening powers come from the same place, a need to prove he is not behind. Seeing those threads pull together is part of the pleasure of reading the arc in order.
Tome Kurata and Musashi Goda add warmth where the plot threatens to get heavy. Both are the kind of friend the series likes to give its characters: loud, sincere and slightly out of step with everyone else. They remind you that this is also a story about people who stand by each other.
If you want to read this chapter well, watch the gaps. Watch what Mob does not ask and what Ritsu does not say. The tension lives there, and it is why the arc ends up being about family as much as school.
It is also worth noticing how the manga avoids blaming anyone. Mob is not neglectful, and Ritsu is not ungrateful. Both are doing their best with what they know, and that is exactly why the distance hurts. A story that gave you a villain would be easier to read. This one asks you to sit with two sympathetic people who cannot quite reach each other, and trusts that you can.
Ready to read? Pick up from Chapter 26, continue with Chapter 28, or browse the full Mob Psycho 100 chapter list.
