The 'Why the Hell Are You Here, Teacher!' comic is popular because it combines comedy and romance in an unexpected way. The characters have great chemistry and the situations they find themselves in are both amusing and relatable. Also, the author's storytelling skills make it a page-turner.
"I recommend" The Alchemist of the Japanese Family on the Day of the Leaf "and" The Beginning of Breaking Through the Comics from Long Shuwen "to you. They are both novels with many elements of comics, including the elements of the Metal Alchemist that you mentioned. I hope you like this fairy's recommendation. Muah ~š