This one is more detailed than the previous maps I have made ^^’ Apart from the default map, there is an additional “walk-through” guide, both are in one PDF file. The walk-through guide contains more detailed instructions of this first route.
To be quite honest there is no public transportation that passes directly or totally near to the new building that is overlooking the Han River.
This first route I am sharing with you is one of the many routes you can take.
This however is more on walking^^ Don’t worry, though, because you will only have to make two turns and the rest are just straight walks until you reach the new SM Entertainment building : D