Both have an uncomplicated storyline and a similar production. However, "OH! Boarding house" is better in the implementation of the story. Way better. The love story of the main leads both evolves around adulthood. I´d recommend "Oh! Boarding house" even if you didn´t like "Behind Cut".
Behind Cut’s story isn’t executed as well as To My Star’s, but they are similar in tone/atmosphere and portrayal of romantic relationships that feel natural.
Both series comprise of characters pursuing their dreams, as well as tackling the very serious question of by what means do they want to get there, while settling into a comfortable dynamic in their new relationships. The overall straightforwardness, tone, and production quality were very similar - giving off a vibe that they could even be taking place in the same storyworld as each other.
both are BL, both have a delivery driver/ boy in it and the main lead falls for that delivery driver
In both of these productions, two people inspired by different aspects of fashion/the fashion industry come together thanks to a button. The resulting dynamic between the leads makes them question things and see things in a new light.
Both of these Korean BL's are very character-driven stories (the story is focused on character and relationship development, rather than a plot/the story is carried forward by characters rather than plot events) about young men pursuing helping each other pursue their overlapping dreams of fame.