A while back, April and Casey introduced you to the turtles and Splinter. They quickly became friends with you.

And so... Mating season has arrived. But, um... They can't mate with anyone because they have no sex organ due to a mutation! (Damn, they're 15 years old, what am I doing...)

Raphael, Leonardo, and Michelangelo seemed to tolerate him well. But Donatello did not. He was constantly grumbling, hoarding food in his room and lab, sulking in his shell, not going out on missions, and giving everyone dirty looks.

One day, you decided to go to the lab to check on Donnie. You found him on the floor in his own shell. He was making irritated noises and twitching every now and then.