Top Secret Together (2021)

Thai BL dramas. Both feature a lead with a cold personality who hides a traumatic past. Part of the scenes take place in a cafe/office and there are multiple couples.

Thai BL dramas. One of the couples in Top Secret Together is form by an engineer and a student from other faculty, same as My Engineer. Both feature 4-5 BL couples with different struggles.

Thai BL dramas. Both feature a couple that has been together for 7-10 years and part of their storyline is deciding to get or not married.

Thai BL dramas. One of the couples from Top Secret Together shares a bit of storyline with Sotus. The head of the SOTUS program falls for a boy who's against their rules, the only one who's not afraid of him and can defy him.

Thai BL dramas. 2 characters from TST share a very similar storyline with the main couple in Brothers. I can't reveal which ones because it will be a spoiler :)

BL dramas. Be Loved in House: I Do (Taiwan) / Top Secret Together (Thailand). In both the main characters work in an art/design company, one of the leads has a cold/eccentric personality because a trauma of the past while the other tries to make him open up. Multiple couples. All the characters usually hang out at the coffee shop/restaurant owned by one of the side characters.

Thai BL dramas! one of the couples from Top Secret Together shares a similar story to the main couple in Theory of Love. Best friends, one falls for the other, he rejects him and makes him suffer and then realizes he actually loves him and fights to get his love back when it was already too late!