What if your cat was capable of turning into a charming boy? After taking time off, Sol Ah returns to school as she finds herself a place to live alone. Per her friend’s favor, Sol Ah takes in a cat named Hong Jo, and a story of the life of two housemates unfolds. However, Sol Ah is not aware that the cat, Hong Jo, has the ability to shapeshift into a human. Sol Ah’s friends start to notice weird things about Hong Jo whenever they run into his human form. Things are about to change around the peaceful single-resident complex, and Hong Jo finds it difficult just being a mere cat whenever Sol Ah is too busy with her life to pay attention to him. Will Sol Ah be able to recognize Hong Jo in his human form? Sol Ah and Hong Jo “Welcome!” you into their romance fantasy story.

Hong Seol and Yoo Jung attend the same college, but they couldn't be more different. Hong Seol is a poor, unpopular student with no money, while Yoo Jung is rich, well-liked, extremely smart, and popular. Hong Seol just wants to get through her college career quietly, but finds herself getting caught up in whatever Yoo Jung drags her into. Can Hong Seol break away, or will she continue to be the only person who sees Yoo Jung's true self?

When Jo Gang-Ja attended high school, she was notorious for fighting. She gave birth to her daughter A-Ran in her late teens and became more responsible. Her daughter A-Ran is now a high school student, but A-Ran is bullied at school. Jo Gang-Ja decides to go back to high school to protect her daughter. Jo Gang-Ja becomes a high school student again.