Why is the title Dangerous Romance? Is it because of the social standing of the two leads? Or is it because really violence is involved?

Honestly speaking, the same trope of enemies to lovers and smart boy tutoring the dumb boy and falling in love has been overused, even by GMMTV standards.
So, I will just write about a few things only.

Firstly, nobody is happy with their surroundings. Sailom is poor but has a living relationship with his caring elder brother. Kanghan is rich, has everything but feels neglected. Anybody else in Kanghan's place would have been happy but not Kanghan. Boy wants his father to focus on him. Which is absolutely right. There is less drama that is why they had to bring in bullying.

Sailom is poor but possess a spine of steel. He is the top student of his year and is getting a special scholarship to study in the prestigious school. And works when he is not studying to earn money. Chimon was channeling his inner Wasuthorn when he was answering the math questions written on the whiteboard.

While at first disliking (or not really) Kanghan, he starts to become friends with him. Sailom's friendship changes Kanghan for good. I like how Perth managed to show the slow but gradual growth until he falls in love.

Sailom falls first but Kanghan falls harder. And Kanghan is not a windmill in love but a hurricane. The upgrade of him from enemy to friend to lover to sugar daddy was pretty quick. And his possessiveness over his love is also immense but his heart is at the right place.

Sailom is a pure hearted boy. He sees expensive things but does not touch them. He has a rich boyfriend but does not take advantage of him, even whe jokingly mentions himself as expensive.

the actual flow of the story starts around episode 10. Kanghan gets mad at his dad and elopes with his boyfriend. But being the dutiful son-in-law and friend Sailom keeps Kanghan's dad updated. In fact, Kanghan's dad and grandma trust Sailom more than Kanghan. I was snorting a lot.

the plot thickens as Kang's father gets shot and Sailom's brother admits his fault. A rift starts between the two. Kanghan's love and possessiveness wins though. Sailom is wind and Kanghan is windmill. Without Sailom Kanghan is nothing.

The rest of the episodes are like Bollywood melodrama. Guns blazing, thugs entering hospital, firings ensued, Kanghan gets shot but no blood comes out. I am glad that they did not extend that shot otherwise I would really drop the series at that point.

The show mentioned teen escort services due to poverty which I was not ready to witness.

The side couple of Nawa and Guy is much more interesting. Pawin and Marc have been main leads of My Gear, Your Gown series and are an established pair of BL world. They portray the same type of enemies to lovers trope but I enjoyed Nawa more than Pai because of his sassiness.

Overall, it's an okay series. I for one will not be rewatching it.