Like one of the other reviews, I personally think this drama was good too.
Like the other review said, no annoying characters, and not cliche at all.

The number of times he loses memory is perfect, not too much rather not too few and the good part is that it came as a shock, which was really good.
I like the FL's personality, she's super chill and not annoying or naive at all. She wants a simple wedding and wedding ring, it feels like she's very down to earth.
I also like the relation between the FL and the second ML, really close but only as friends.
The second FL, the actress, was also super cool and chill, she gave up really quickly as she realized that the ML only loves the FL.
There's a lot of comedy happening in the office and all the coworkers are really funny.
The ending was nice, I looks a lot like every character ends up finding someone, which is a very happy ending.
I recommend it.

And regarding the sound, then is most likely because you are watching it on youtube. Youtube is not the best place to watch dramas, i recommend IFVOD. tv, but it's only for Chinese speaking people, sry.

If you're looking for more dramas I recommend:
- Love Designer
- My Love, Enlighten Me
- Girlfriend
- Well Intented Love
- My Dear Lady
- Sweet Dreams
- Because of Meeting You
- Moonshine and Valentine
- Luckys First Love
- A Little Reunion
- Put Your Head on My Shoulder
- My True Friend