I used to have comprehensive list of reasons for 0.5 in RR
- AI cover, 0.5
- MC liking a girl, 0.5
- MC disliking a girl, 0.5
- MC doing any sort of flirting, 0.5
- MC showing any strong emotion, 0.5
- Girl don't auto fall in love with MC, 0.5
- Harem, 0.5
- mention of nudity, 0.5
- consensual...