Both involve time travel, where the FL lead gets thrown back in time and tries to prevent her ML from dying.
In Dramatic Self-Help Strategy the FL has a trigger for her to time travel, while in Lovely Runner FL doesn’t have a trigger.
Both basically have the same plot concept, which was done quite well in both.

Both have ill female leads, but in You Shine in the Moonlit Night the FL has always know about her condition.
The leads both meet by a coincidence so to speak.
You Shine in the Moonlit Night focuses more on the ML doing his best to be there for the FL, and was a very sweet young romance story.

In both e see the relationship of the main couple progress and grow, and then the FL leaves the ML.
Our Meal for Tomorrow focuses more on the ML during the separation compared to Love Like the Falling Petals focusing on the FL’s struggle during her separation from the ML.

Both deal with an an ill lead character.
In I Give My First Love to You the ML has a heart condition and it is known by him and the FL from the beginning.
Both show the love of the couple, but in I Give My First Love to You we get to see some struggles about the illness by the couple as a unit.

The FL in My Girl has the mental/memory issues.
The love interest in both meet the lead characters through work and learn about their issues from there.
In My Girl the ML helped the FL out of a feeling of guilt, but there are other complexities involving other characters.
In Don't Forget I Love You it only focused on the ML living his daily life with his memory issues, and we don’t see much progress with his cure.
But in My Girl we can see some progression and other aspects of her life besides her memory issues which was nice.
My Girl also has some drama angst with love triangles too.

In both the ML suffer from memory issues.
In both we see the FL help the ML with their memories.
In Well Dominated Love there is some history between the couple already, which is one of the main differences.
Similar vibes where the ML believes in love with the FL and works hard for it despite his memory issues.

Sounds similar due to the gaming aspect.
The leads also had the same major in school, and similar aspirations to each other in both shows.
ML is seen as cold to others