It's Han in the last part.

Now the explorer enjoys pampering and feeding his giant human, while the human simply enjoys his fabulous new intergalactic life.

Cared for and fed, the human now rejoices in the comfort and care offered by the intergalactic explorer, while the Alien simply enjoys lying in his enormous, soft waterbed filled with body fat.

In the new room, the Aliend shoots him with a new ray, which returns the human to his normal size, mixed with his new enormous and obese body.

The galactic explorer decides to take his now enormous human blob out of its box and carries it to a fairly spacious room so he can give it special treatment.

Having gained weight until he completely filled his box, the human is now in a state of extreme obesity. The curious Aliend marvels at the result of all his work, so now he just keeps feeding and caring for him.

Changing his methods, the explorer now devotes himself to caring for and feeding his small but enormous mass of fat that has become his human, analyzing him to give him the best comforts. The Aliend makes sure to give him plenty of food to keep him full and satisfied.

Confused by what he sees, Aliend wonders why his specimen, the human who is now morbidly obese, is struggling to stand up. The explorer is completely confused and curious at the same time.

Amazed by the result, the explorer watches as the small but very fat human enjoys eating high-fat food. Fascinated, the alien decides to get more of this type of food to give to his test subject.

The curious Alien wants to test the hunger of humans, who enjoy eating so much, especially at that size.

The boys quickly accepted their new realities, since they are only hungry. It doesn't matter if they continue to gain weight nonstop; as long as they have someone to care for them and keep them satisfied, their lives will be assuredly filled with fats and sugars.

Already greatly increased in number and expanding their bodies beyond morbid obesity, the boy who enchanted them will soon have to take care of them when they can no longer move their limbs to eat.

Now that one of their friends is immobile, they all get together more often to help the most obese one and also to eat larger quantities of food.

Months later, at a new meeting, the boys continue to change significantly in terms of clothing sizes, hip width, and belly size. The change is now so noticeable that it seems they will soon reach a point of no return.

In a new meeting, wanting revenge for having his attention stolen by his fat body, the young men, who possesses magical knowledge, casts a spell with the purpose of making the fattest dude even fatter. Unfortunately, his spell backfired because it ended up affecting the rest of his friends.

I'm glad to be able to enjoy your amazing work and I would personally love to see more drawings of Theo fattening up other characters, whether they are yours or someone else's.