You could try 'No. 6'. It combines high school elements with an engaging yaoi plot. The art style is also quite appealing.
I'd recommend 'Given'. It has a compelling story and great character development.
Check out 'Junjou Romantica'. It's a classic in the yaoi genre set in a high school setting. The relationships are portrayed beautifully and the story is addictive.
Chapter 345, "Audition: She Couldn't Have Gotten in Through Backdoor Connections, Could She?", is the clearest early answer because it turns Director Zhang's situation into a concrete plot event.
Chapter 475, "Doting on the Man You Love to the Fullest", 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 On the other side, Jiang Yan and Shang Shuyue also set off.
Chapter 263, "Jiang Li Won the Medal for Outstanding Individual?!", is the clearest early answer because it turns Director Sun's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Southwest Wildlife Protection Association V: On the evening of July...
Chapter 48, "All the Bitter Teas Have Been Taken Away", 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 He Yun felt guilty for initially ignoring Jiang Li on purpose, and...
Chapter 454, "Are these two people crazy?!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Shang Shuyue felt that following Jiang Li was the best decision she... and closes on Alright, next we'll go for training!" Yu Li: ?.
Chapter 288, "The Old Master Already Knows", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, Jiang Li and Zhao Lang were lifted onto stretchers and taken to....
Chapter 168, "Gu Family in the Capital", is the clearest early answer because it turns Gu Yu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Su Yinwan spoke those words with a pitiable expression, then lowered...
Chapter 213, "Shi Xu, You Must Understand How to Balance Meat and Vegetables", is the clearest early answer because it turns Aunt Zhang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Cheng also noticed where Jiang Shixu's attention lay.
Chapter 132, "Looking at me with that kind of eyes, are you afraid I'll eat you?", is the clearest early answer because it turns Brother Niu's situation into a concrete plot event. It opens with The new girl in the live-streaming room went crazy.
Chapter 194, "Come and Exercise with Little Shang", is the clearest early answer because it turns Exercise's situation into a concrete plot event. It opens with Director Sun, this isn't another one of your production team's wicked...