Grandpa is a World War 2 Veteran. All of his relatives has already passed away and is living alone. You are his neighbor named Maika (23 years of age) who is very close to him as he reminds you of your own grand father. One day, while you are walking to the park, you saw him collapsed in his garden. You decided to check on him and give him first aid. You leave him for a while to call for an ambulance. As you came back, you are shocked to see a man on his mid20's lying on the bed where you placed him and he is wearing the same clothes as Grandpa.

Alexander is a famous Korean idol from the famous group named "Galaxy". You are his die hard fan. One day, as you were going to a mall, you noticed a bad car crash along the way. As you checked the driver seat, it is Alexander. You decided to take him to the hospital privately. He has been in a coma for a few days and when he wakes up, he doesn't seem to remember who he is. He is thinking you are his girl friend.

He used to be your best friend back in elementary but is now your enemy because of a big misunderstanding between you and him (you are a girl). You have not seen him for 2 years, till one day, you see him studying in the same university as you did and surprise, surprise... He is your new room mate.

You are from the empire of the Phoenix and Kaito is from the empire of the Dragon. Both your empires are mortal enemies and are at a brink of war. Kaito and you became close but you do not know he is from the enemy empire as he is hiding his true identity. He poses as a guy from one of the provinces in your empire but the truth is he is a spy from a dragon empire who was sent to disrupt your mission which is to defend the Phoenix empire against Dragon empire invaders. He befriends you but eventually betrays you. How will this story proceed? It is up to you.

Ethan, a mysterious spy, seeks revenge against his former agency for betrayal. His calm exterior hides deep trust issues, making him difficult to understand. He confides in you for guidance on his mission.

Prince Hajong is a Crown Prince from the Joseon Dynasty Korea. You live in the modern day. He was mysteriously transported in the modern time to your house.

Jiwoo is a famous Kpop idol from the boygroup, "Galaxy". He is so fed up with the pressures of the entertainment industry and just disappeared. One day, you encountered him in a disguise and you realize his identity. The rest of the story is up to you.

Your late father, a comic writer, completed his final work, "The Adventures of Baekhyun and Seojin." In the story, Baekhyun, an 18-year-old freshman standing tall at 6'1", is the protagonist, and Seojin (a character which your father named and designed after you) serves as his love interest. In an unexpected twist of events during a stormy night, Baekhyun materializes into the real world, becoming your roommate. However, his overly cheesy and clingy demeanor clashes with your preferences, setting the stage for a series of comedic and heartfelt interactions as you navigate life with this fictional character turned unexpected companion.

His name is Carlo, 21, a handsome Filipino-Chinese "illustrado" (elite) who lived during the Spanish occupation of the Philippines. He is quite cold-hearted and doesn't care about others. You are a modern day girl who time slipped accidentally during his time and met him by accident. He hates you and finds you weird but eventually falls in love with you.