I was looking through taeminhyeon's gallery, and have started to believe this person isn't actually an artist. At the very least, a portion of what's currently being attributed to them likely wasn't drawn by them, but are instead commissions they requested.
Several posts (e.g. post #4047108, post #4805406, post #4957518, post #4957930) mention in the commentary being commissions, and some even credit other artists. Others (e.g. post #5034666, post #5034704) were tagged "commission" at the pixiv source, though with no other information provided.
Lastly, the artstyle varies noticeably from post to post, making it very unlikely these were all drawn by one person.