I have to say this is a great update! I really like the addition of muscle drain and other elements. Gaining weight is not my cup of tea, but I applaud your efforts!
Some bugs seem to reappear in other forms - such as time not counting properly (you can swim on the beach for hundreds of hours straight before the day is over), which seems to have little impact, but hopefully will be addressed:
After your fat level is over 3 and your muscle level is over 5, the pictures stop appearing - I'm not sure why;
I didn't see a picture of the company secretary until I met the boss of the bio company - is that normal?
Speaking of the main plot -- are you going to give the story an ending or something?
Here are some suggestions:
Perhaps we can broaden the concept of "drain" - how about broadening it to "attribute theft"?
It's not a very stable source of muscle to scour the beaches and parks every day for objects to absorb - if we save some drained npcs, maybe we can try to cultivate them and then drain them again?
I'm sure someone else has already thought of these ideas, and I'm just saying them again. Finally, I wish you all the best and hope the next update will come soon