Kurth's manga / #Fantasy(68)

Main character discovers that one person in the group is a regressor, he be manipulating the crowd

So basically, this girl reincarnated into a BL book. She lived till 16, got the disease that the MC got, died, but lo and behold, minie time loop, she wakes up at 16 years old, on her birthday. Does research, dies again, wakes up at 16 again. She decides to become the MC's butler. After being a pussy butler, MC gets possessive when he is healthy, no he no want her to leave. she crosdsdress

MC has a limited life span but is talented AF, will he be able to contract his short life with effort and talent?