Male Supporters Want to Fall in Love [Quick Transmigration]

Why is it that only male and female protagonists can have a love line? Zhang Ning travels through the book to the unfinished novel. As the male supporting role, he has to make up the main line by himself, complete the plot, and give the novel a satisfactory ending. [Ancient and ancient novels]: Sick general X young son of a family (finished) Zhang Ning: The male lead?Which is the hero?Wait, where is the heroine's token of love?System: No, you can make one yourself and send it.Zhang Ning:? ? ?As a result, Zhang Ning accidentally sent it to another male supporting role. The second male supporting role has a deep meaning: You really like me. [Modern]: Love rival's elder brother x wealthy illegitimate son (completed) CEO: How dare you like my sister?Zhang Ning: Actually, I like men.President: Stay with me, I will give you what you want.Zhang Ning:? [Western Fantasy Travel Novel]: Knight x Evil Dragon Chapter. Evil Dragon Ning said to the princess: Don't be afraid, your knight will come to save you.The princess changed her skirt, smiled and said: Really?Zhang Ning stared at the princess's big skirt: ... Wait, why is this princess a man?There is an ancient taste, there is also dog blood, there will be be in the small world, but the ending is definitely HE1. There is only one attack!one!No!deliberately!Emotionally abused (suffered) no! 2. The original world (the time-traveling novel) has BL and BG lines. Gong is the hero or supporting role in the original world, but the emotional line must be Shou. 3. The plot line of the original world itself is not complete. , don't get too entangled in logic (asking is a question in my head)