Not actually a romance (yet?) | Psychic being transmigrates into the body of a gorgeous slag idol, is accused of mu*der, plays mindgames with police in between long soaks in the tub. ... more>>

So far there are 3 possible MLs. The author spends a lot of time telling us how gorgeous and captivating MC is. You'll either like this or you won't. Personally, I enjoy the mystery surrounding MC's identity, discovering his powers and intentions while he helps police solve crimes and builds his reputation as a genuine psychic. <<less

Career with a side of romance(?) | Gentle, average-looking but brilliant character actor MC dies and wakes up as a gorgeous young man with an unclear past. Rebuilds his career with a beautiful new face, starting in an idol group with a hit TV series. Several possible male leads include the ex who betrayed him in his previous life, a wealthy and talented heir, and an insightful, mercurial talent exec. The villains are extra irritating and slap-worthy!... more>>

Focuses more on the MC's career than on romance, and the ML isn't clear until the end. Pays attention to the relationship-building that's necessary in showbiz as well as developing an international fanbase. I liked that many of the characters feel multi-dimensional -- they may do good things for the MC, but they also have a selfish side and pursue their own goals. <<less

Career with a side of romance | Mature movie emperor MC is brutally mu*dered after he catches his scum director husband having an affair with white lotus protégé. MC wakes up in the body of an 18th-tier idol and rebuilds his acting and singing career with the skills he polished over decades. Icy film emperor ML takes a liking to MC's astonishing talent and calm, collected style and finds various excuses to help his career.... more>>

Focuses more on showbiz than developing the romance, which is why it appears on this list. Strong Mary Sue flavor but it's justified by the decades MC spent originally developed his skills. Enjoyable story that includes a bit more of the international side of things. <<less

Romance with dubious elements | Rebirth orphan MC decides to change things the second time around by choosing to live with film emperor brother ML he doesn't know instead of his slag uncle's family. ... more>>

Tries way too hard to build a romance between 15-year-old rebirth MC (who's mentally not actually 15) and 24-year-old ML (who isn't actually his blood relation). ML is stated to be sexually attracted to our young MC, but MC doesn't share those feelings at all, at least not during the first 48 chapters. If you're able to overlook that issue, this is a fluffy BL romance where the shou spends a lot of time worrying about high school exams while bystanders tease the gong about raising his bride. <<less

Romance with a side of angst | Headstrong novelist / screenwriter MC agrees to shoot a dating reality show with elegant, princely film emperor ML he divorced a year before. Somewhat angsty exploration of two characters as they rebuild their relationship. ... more>>

Some annoying / infuriating elements: 33-year-old MC constantly complains about being old (??). MC feels like he's lost his youthful free spirit by occasionally restraining his rude loud mouth (dude, this is called growing up and getting over yourself...). Taciturn ML refuses to tell MC his important plans then punishes MC for not knowing about those plans. MC and ML witness the aftermath of an actor's probable r*pe and don't report it, and then ML punishes MC for not wanting to participate in such a dark industry. 

Fortunately there IS character growth.

SOMEWHAT VAGUE SPOILER INCOMING: 

Then there's the matter of the divorce papers, for which I hold ML 100% to blame (if someone refuses to sign divorce papers while begging you to reconsider and you literally force their hand, it is not equally both your idea to get divorced). <<less

Romance with a tragic family history | Actor MC investigates his sister's tragic death and is forced to marry CEO ML who hates him. ML's opinion changes once he finds out MC is a lovely person who faked his own bad reputation in order to bring his sister's tormentors to justice.... more>>

So far I've felt a lot of suspense while reading this, which is unusual for entertainment circle BL. I'm worried MC will be in danger from the bad guys, and I'm cheering for ML when he rides to the rescue. ML's changing opinion of MC is done well and progresses naturally. TL ed is a tad dodgy. <<less

Romance x conflicting emotions | 18th tier actor/baker MC agrees to be "kept" by entertainment CEO scum gong ML. MC is very low key, realistic, and undemanding about the relationship, in return ML pretty much ignores him aside from the rare times he invites him to a hotel. Three years in, ML gradually realizes he wants more... and is shocked to find out MC is more interested in his cake shop.... more>>

A relationship that starts off purely transactional and gradually blooms into something warm and sweet. The rating is low, but then ML starts out scummy and cold. <<less

Romance with dubious elements | Film emperor MC transmigrates into the body of a young actor, runs into brilliant scientist / mental three-year-old ML who needs his help to cross the street. ... more>>

I have no issues with a romance featuring a person with autism or another atypical condition (see Beloved Marriage in High Society for a less extreme example). What I have trouble with is a s*xual relationship with a character who has the emotional maturity of a very young child (and then turns into one of those obsessed / possessive yandere MLs, which I'm not into either). However, plenty of people disagree with me and enjoyed this novel. What doesn't work for me may work for you, so if you're able to enjoy the ML, this should be a fun entertainment circle romance. <<less

Romance a bit more focused on revenge | Rebirth actor MC wakes up as his younger self and seeks revenge against the rich villainous actor who repeatedly pitted him and scarred his beautiful face in the original timeline. Gets fluffier around the midpoint.... more>>

The MC felt a bit vicious and revenge-minded in the early chapters unlike rebirth MCs in fluffier stories. TL ed is a tad dodgy and difficult to read. <<less

Romance with a side of depression | Sad idol trainee / dancer MC is disowned by his slag rich adoptive family, chases popular actor brother ML into showbiz. ... more>>

This has the autism tag but to me, MC didn't display symptoms of autism in the currently translated chapters (ch 64). Rather, he seems to lack joy and is detached from his emotions, probably because he was raised by people who emotionally abused him (the story states they ignored him and were emotionally unavailable). 

Although we get scenes from ML's POV, we don't get to see ML thinking how much he cares about MC. We can tell by his actions that he may be starting to, but since ML isn't super devoted the story comes across as less fluffy / romantic than others on this list. <<less

Romance with dubious elements | Film emperor MC transmigrates into the body of a starlet who agreed to be owned by domineering CEO ML for one month. MC rebuilds his career while being chased by different billionaires of varying degrees of shadiness.... more>>

Opens with drugging + r*pe by ML, which is acknowledged by everybody to be r*pe, and never happens again, but is treated more like a plot device for MC and ML to have a s*xual relationship instead of a crime. If you can overlook that and the talk about buying/selling various characters (which I'm sure really does happen IRL...) this is a slightly shadier entertainment circle romance. <<less

Romance with dubious elements | Mercenary MC transmigrates into the body of a fallen child star who previously declared his love for film emperor ML. ... more>>

I couldn't get into this story and dropped it, but it seems fairly popular. References to drug use, repeated r*pe by ML, stereotypical "uke" behavior by MC who never acted that way before transmigrating, etc.  <<less