There's also 'Banana Fish'. While it's a more complex and darker anime, it has a relationship between two male characters. The main character, Ash, is a very strong and muscular character in a tough world. The relationship between him and Eiji is a central part of the story that unfolds throughout the series.
Yes, there are some anime that feature gay characters with muscular builds. For example, 'Yuri!!! on Ice' has male characters who have a certain level of muscle definition and there are undertones of a romantic relationship between the main characters. It's a popular anime that showcases the story of figure skaters, where the relationship between the two male leads is a significant part of the story.
Chapter 11 is the strongest chapter-level answer because it starts from After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and... and follows through on Miss Qin, please accompany us to the police station to explain this....
Chapter 840, "How did you meet Miss Jiang?", is the clearest early answer because it turns Rong Kexi's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Li seemed surprised that she would suddenly speak, paused for a...
Chapter 738, "Here to Fight!", is the clearest early answer because the buildup finally cashes out in a real clash. The chapter gives readers a real answer by opening on Feeling that something was amiss, he immediately called Jiang Li.
Chapter 853, "The Bracelet Worn by the Empress?!", is the clearest early answer because it turns Phoenix Jade Bracelet's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li carefully examined the branches and leaves for a while.
Chapter 786, "Working at Chen'an?!", is the clearest early answer because it turns Jiang Shixu's situation into a concrete plot event. It opens with When Jiang Li left Taiqi's office building, it was already getting... and closes on She recognized that this must be the streamer Xiao Xue..
Chapter 856, "Hurry and Stop Work!", is the clearest early answer because it turns Hurry's situation into a concrete plot event.
Chapter 753, "Final Judgment", is the clearest early answer because it turns Final Judgment's situation into a concrete plot event. Early on, In the decade she had been with Fang Wenzhe, Shu Yan never thought.... By the end, But Shu Yan was simply too outstanding..
Chapter 725, "Still Want to be the Second Young Master of the Jiang Family!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
Chapter 811, "Still Thinking of Helping Me Boost Sales During the New Year", is the clearest early answer because it turns Yet Jiang Yan's situation into a concrete plot event.
Chapter 644, "Has Shang Shaojing Actually Gone Bankrupt?!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Su Yinwan was already on her way home when she saw the trending...