What is a Korean martial art that is just like Aikido?

Hapkido is a koren art very similar to aikido , but its not entirely the same , its not as circular as aikido. However both the founder of aikido and the founder of hapkido learned under the same teacher. The difference with hapkido is that it has korean roots and you will see a lot of kicking techniques similar to those in taekwondo.|||Hapkido is like a mixture of Aikido, Taekwondo, and judo. A good standing style.|||Hapkido is the twin of Aikido,and they are connected historically.