Roy Fun Tawan Duerd is the second part of The Rising Sun Series - It is about Ryu who is in an arranged engagement to a very young lady named Mayumi. About Ryu taking over Takeshi's place and his love line story. - if you liked it you might as well continue the rest of the series. :)

Highly Recommended Lakorn - Leh Ratree is much better than Roy Leh Sanae Rai. Dad sells daughter off to pay for debt. It does follow the typical innocent female lead genre but the female lead is not stupid and the main male lead is a jerk-like in the beginning for a actual purpose who turns out to be a understanding and kind man. The chemistry between the main leads is amazing and it has very well developed characters. You will certainly enjoy the bickering. :)

Both lakorns came out in the same year and worth giving it a go.
If you liked SLAP/KISS genre and conflicting emotions of love/hate/revenge then recommend checking out this lakorn. Yes, the main female lead gets kidnapped to an island for the majority of the drama- turns out to have kidnapped the wrong person and you think you know what's going to happen. Its one of the first of it's kind. :)