When he gets too overworked specially when fighting he burns an insane rate of calories, he reverts temporarily back to skinny sakamoto , he's been an assassin since a teenager so his body is different. There should have been an episode between lu and sugar park where sakamoto reverts to skinny after a physical feat but they skipped it. I think they wanted to keep the transformation a surprise to hype up the ending of this episode
When he gets too overworked specially when fighting he burns an insane rate of calories, he reverts temporarily back to skinny sakamoto , he's been an assassin since a teenager so his body is different. There should have been an episode between lu and sugar park where sakamoto reverts to skinny after a physical feat but they skipped it. I think they wanted to keep the transformation a surprise to hype up the ending of this episode
He is like fatgum from mha, he looses fat while fighting and he gets slim