HIStory: Stay Away from Me (2017)

Both are BLs that involve a famous/celebrity lead moving in with a common lead; romances follow an enemies-to-lovers storyline.

Similar type of story and both Taiwanese! I definitely recommend checking it out!

Very similar storyline where two step brothers come together and a familial relationship grows beyond and evolves into something more.

From the same HIStory series so a bit of a similar thread is expected between series. The similarity between the two series is when two step-brother relationship grows beyond the familial and buds into something more.

-The story in both dramas have the same stepbrother plot between the main couples, as well as a fujoshi.
-In 'HIStory 1', both stepbrothers met when they were grown ups already, one of them is a celebrity.
-While in 'HIStory 4', both stepbrothers met when they were still young, one of them fell in love with the older stepbrother.

If you can stomach stepsibling plots, ridiculous supporting characters, possessive x passive ships, and moments of beautiful cinematography or acting that are too good for their respective shows, then look no further for messed up yet oddly compelling watches.

They both have an idol moving in with a regular person. Although Love Online: Extra is bromance because of Chinese censorship but the 2 leads have really good chemistry like in HIStory: Stay Away from Me

It's also a BL story about step brothers who become roommates.
They also don't like each other a first, but then it changes.