I have to confess that I am interested in these books because of "Star & Sky the series" that is aired on TV right now in Thailand.
Overall, although the plot is quite simple, these books are still good enough to read. Note: This comment is for book 1 and book 2 of Star in my mind.
In terms of the TV series, after watching the first three episodes, I can tell you that "Star in my mind" is A MUST WATCH BL series. It will make you smile and fall head over heels in love with the two main characters for sure.
P.S.
1. There are many differences between the books and the TV series. Therefore, even you have already read these books, I recommend that you had better watch the TV series too.
2. Because I plan to read all books written by Peachhplease, I think I should clarify something first. Although I might rate many Peachhplease's works only 3 to 3.5 stars, I have to say that actually, I DO LIKE her works and her style of writing. Due to the simplicity of her plots, I might not be able to give more stars to her stories, but it is unquestionable that all of her works are good or even great. With warm-hearted storylines, all of Peachhplease's works will definitely give you some feelings of nostalgia, and make you smile or even cry with joy.