Affectionate Male Partner, Stop

There is often a kind of male partner in romance novels. They may be the heroine's childhood sweetheart, the big brother next door, or the knight who has been protecting the heroine. In short, if taken alone, they are like the best among men. But whenever they meet the hero, they are only one move away from each other. Because they are not the protagonist, they can only end miserably, earning a wave of sympathy tears. As a new time-traveler who has just started on the road, Zhang Hewu's mission is to help the male supporting characters stay away from the turmoil of right and wrong between the male and female protagonists and achieve a happy life.