Alien Son brings us the story of a family that ceased to be a family in a chaotic way. With the revelation that their only son was not really their son but that of a millionaire. This would leave an inheritance when he gave him grandchildren.
Leaving Shinyun with 4 sisters who, out of nowhere, are no longer his sisters and could now be his future wives. A rather problematic situation for most but not for our protagonist.
Characters Alien Son
Shinyun
The only son of the family until it is discovered that he is actually the son of millionaire and escapist Nam Chae Gwan who will leave him an inheritance if he gives him grandchildren. This won't cost him much having 4 sisters who are now his candidates for wives.

Shinyeon (Oldest daughter) - Alien Son
A young teacher with a very voluptuous body of calm and quiet personality. Practically, you can’t alter her or at least that is what her brothers believe.

Shinju (Second daughter) - Alien Son
The second daughter also known as the mermaid, has many friends and an envied body due to doing a lot of exercise. She is not interested in her brother or at least she wasn’t until she heard about the inheritance.

Sinbi (Third daughter) - Alien Son
Strange and a little weird, she is the third daughter of the family who you can't understand most of what she says or why she says it. She is thin and always has a lot of clothes covering her body, but she is also very curious, too much we should say.

Shin Hye - Alien Son
The last of the sisters, she is the cutest and smallest in terms of build or how she treats others. This is really a facade since she is actually a strong-willed woman underneath. Can she conquer her former brother before the others take over his love?

Nam Chae Gwan
The millionaire father of Shinju who abandoned him with his "parents" at birth because he didn't want to take care of him. He only returned when he was older because he wanted grandchildren and leave an inheritance of about 5 billion, which really changed everyone’s face.

Opinion on Alien Son.
Alien Son has one of the most trite arguments I know and with a family of pure women the protagonist has plenty to choose from. But before anything else, he must test them all to see who actually convinces him.
A story with lots of sex and abrupt twists where practically everything takes place in the same house. While their parents go on a year-long vacation where they will have to give grandchildren or he won’t inherit his fortune.