The character's intentions, abilities and origins are shrouded in mystery and uncertainty, getting clearer and clearer every few chapters. This is what helped me to continue Legal Drug however the series brought a focus to strange things in the manga unnecessarily. This includes background characters saying profound things to the main characters including their full names; it seems like they'd get a call back moment in later chapters but this isn't the case. The fact that Legal Drug contains these red herrings that never get concluded really disturbs the immersion and makes finishing the manga feel so-so.
What this manga lacks does not make it unreadable or unenjoyable, the strengths are clearly in it's progression of plot and characterisation. I feel like the unfinished feeling of Legal Drug was due to an extensive and interesting plot developments/devices were rushed into 3 volumes. Reading the sequel, Drug and Drop, may connect loose ends but I feel like I shouldn't need to read a sequel series to be content with the first installment.
