Both are Thai BL dramas that are murder mystery shows with a detective(s) investigating the case. There are several suspects in the murder mystery of both dramas.
Both are Thai BL dramas with a psychological horror/mystery theme, with 4Minutes having a more sci-fi edge and Happy Ending a more trippy, dream-like feel. There is male-male romance in both shows, although both shows are more story focused than romance focused.
Both are Thai BL dramas that involve murder mystery. Goddess Bless You from Death leans more to supernatural horror while 4Minutes leans more to sci-fi.
Both are BL dramas whereby the main character and his love interest initially do not have a properly defined relationship. They have a sort of friend with benefit situation under the guise of the love interest 'helping out' the main character. My Stubborn is a Thai BL drama and Secret Lover is a Taiwanese BL drama.
Both are Taiwanese BL dramas whereby the main love interest has a secret crush on the main character and they go through some ups and downs before becoming a couple together.
Both are BL dramas whereby the love interest has a secret crush on the main character and cunningly manipulates the main character into loving him back naturally. Love in the Air is a Thai BL drama and Secret Lover is a Taiwanese BL drama.
Both are BL dramas and as the titles of both suggest, it is a where a guy on one side has a secret crush on the other guy before them becoming a couple together. Secret Crush on You is a Thai BL drama and Secret Lover is a Taiwanese BL drama.
Both are Taiwanese BL dramas with both sides of the main couple having very different personalities. This together with miscommunication drives most of the difficulties in the BL couple relationship.
Both are Taiwanese BL dramas with a friends to lovers type of plot where one is secretly in love with the other. There are some conflicts and misunderstandings that cause the BL couples to face difficulties in their relationship.
Both are Thai horror dramas that have some supernatural elements. In Girl from Nowhere, the main character is a girl that is a supernatural entity that punishes all the wicked students. Meanwhile, in Dead Friend Forever, the main character is a boy that is missing/dead and everyone of his classmates involved in his misery/death is punished for it. DFF has some male-male relationships although horror is the main focus instead of romance unlike a traditional BL.
Both are Thai BL dramas that have a detective theme solving murder mysteries. Goddess Bless You from Death is more supernatural themed while Manner of Death is more "who done it?" theme.
Both are Thai BL dramas that are action packed and have power struggles. Both are sort of rivals to lovers plot where the two main characters have to work with each other despite a complicated love-hate relationship.

