Man, netorare (NTR) in visual novels is like biting into what you think is a chocolate chip cookie only to find raisins—some people love it, others feel betrayed. The easiest red flag is when the protagonist’s love interest starts acting distant, sneaking around, or suddenly praising another guy’s 'kindness' while the MC remains oblivious. Games like 'Marco and the Galaxy Dragon' hide it under humor, but others, like 'Dark Blue,' slap you with explicit cheating scenes. Look for sudden POV shifts to the rival, or texts/phone calls hinting at secret meetups. Music also plays tricks—romantic themes turning melancholic or tense.
Another giveaway? The protagonist’s helplessness. If he’s a doormat while the heroine 'explores her feelings,' buckle up. Some games even have 'corruption meters' or choices that accelerate the NTR. Community tags on sites like VNDB are lifesavers, but watch for misleading labels—some devs tag 'light NTR' when it’s full-on emotional demolition. I once played a game marketed as vanilla, only to hit a scene where the heroine 'comforts' the rival after his 'rough day.' Never trusted store blurbs again.