- Adaptation Displacement: Sort of. The series started as a Korean-style, vertically-read webcomic, but most people are more familiar with the manga port or the anime adaptation.
- Arc Fatigue:
- Some weren't too happy about the volleyball chapters due to the continued focus on Kariu after already having an arc dedicated to her revolving around Hishiro trying to befriend her. However it's later revealed that this arc had a lot of subtle, important setup and foreshadowing regarding the Re Life experiment itself as a whole.
- There were also some folk who got sick of the Hishiro revelation chapters due to keeping the main character, Kaizaki, Out of Focus for several chapters.
- Many readers find Ohga's Story Arc where he's struggling to decide on what university to go to due to an issue concerning his brother to be a pain to read through due to its incredibly slow pacing.
- Base-Breaking Character: Kairu is the most divisive character in the series, largely due to being the source of a lot of the conflict for the first half of the series and Arata being relegated to playing Supporting Protagonist as a result. On the one hand, you have those who find this to be realistic both due to her age and the fact that the ReLIFE program almost calls for Arata taking on a supporting role in his classmate's life. There's also those who found it refreshing that a "Tsundere character" wasn't attracted to the main character for once. On the other hand, there are detractors who found Kairu far too abrasive and a spotlight stealer who got two lengthy arcs that both dealt with her issues with being honest about her feelings.
- Broken Base:
- Onoya turning out to be an employee of ReLife is either a great plot-twist that caught a bunch of people off-guard or it was a pointless twist that added nothing to the story.
- In Report 111 and 112, the revelation that Hishiro knows about ReLIFE, and being a subject, removed some of the tension her romance sub-plot had for some readers. In addition, a majority of these people are also disappointed that the revelations with Hishiro was too obvious and safe to make for a true plot-twist. For others, people are just happy that the mysteries are starting to unfold or that an adult Hishiro in the same situation is a better fit for Kaizaki self-development in the experiment.
- Ensemble Dark Horse: What Hishiro was early in the series before she had much prominence. Her fans were quite pleased when she turned out to be the main heroine.
- Family-Unfriendly Aesop: Played with. One lesson Kaizaki learns is that it's sometimes more important to let a bad situation between people bullying, discrimination, or a spat between friends run its course, because intervening might only make it worse and screw you over, too. Kaizaki can attest to how badly this can go. That said, neither protagonist is entirely satisfied with this way of thinking, and some other characters eventually come to praise Kaizaki for having had the balls to do the right thing despite the consequences.
- Hilarious in Hindsight:
- In chapter 100, Onoya accompanied of Hishiro, Kaizaki and Yoake said to Ohga that a young girl's advice in love is good for him. There isn't any "young girl" in their group at all!
- Hishiro's birthday is on 25th of December. She's also a "Christmas Cake".
- The Scrappy: A blonde student named Hana, who was introduced recently as a part of the festival committee, has gotten a lot of hate for existing just to cause problems for Kaizaki and company as they prepare for the school festival.
- Tainted by the Preview: The premise of the series, the idea that a 27-year-old man could possibly end up in a relationship with a 17-year-old, has had some people looking elsewhere.
- They Wasted a Perfectly Good Plot: Tamarai's love life that is implied to be related Aki and Nobu, since by that time Hishiro is too occupied with her future with Kaizaki and Tamarai wanting to preserve the relationship that the subplot never got explored.
- Values Dissonance: The idea that the reasonably well adjusted Kaizaki has irreparably destroyed his life by quitting a job in his twenties could come across as melodramatic or downright silly in the west, but company loyalty is of paramount importance in Japanese culture, and Kaizaki choosing to walk away instead of sticking it out is seen as an act of cowardice that could very well have consigned him to a grim future. Downplayed, if not reversed entirely later, as other characters stuck in the same "black company" express admiration for what Kaizaki did, and The Reveal that his positive personality traits were actually factored into his candidacy for ReLife in the hope that they'd rub off on Hishiro, who failed to function as an adult not because of trauma, but because she never developed any social skills, interpersonal relationships, or life experience in her formative years.
YMMV / ReLIFE