This super cute YCH by  Yookey stars  Marshallfox.1971 and my red rat Xerry.

Ever since Marshall has grown into a big college boy, he has spent a while studying and hanging out with his roommates Weaselwick and Weaselknack. Xerry on the other paw has graduated from elementary school and has spent years of private study and being babied by his beloved Mrs. Nuttkins, while his girlfriend Sakasha Taijanov tries dating with him.

Then one day during a summer break from college, Mrs/ Nuttkins holds a reunion for a number of her former students. Xerry is overwhelmed that everyone is taller and bugger than him now. While guys like Davey and Amber are as nice and playful as he remembers, some of the cubs have turned into pretty nasty bullies and they enjoy tormenting and belittling Xerry for his sissy, girly attire, giving him diaper wedgies and tail tugs. The frightened and upset rat runs to Marshall for help and hugs him tightly. Furious that the bullies messed with his little sister, he knocks their heads together and trips them flat on their faces. Normally Mrs. Nuttkins would be against this kind of violence, but given what happened to the little rat, she ignores it completely.

Xerry is very scared that things are not as he once knew. Everyone is bigger than him, nobody comes to play with him, and Abbey Nuttkins as well as Sakasha is all he has left. Sympathetic for Xerry, Marshall invites him to spend the night with him for old times sake. Xerry can't hug and thank Marshall enough for his kindness.

At Marshall's house, Xerry is brought into his big brother's brand new nursery. Marshall invested a bit of his allowances and stipends to create his own home from college nursery so he could have the occasional nostalgia trip. Xerry eagerly goes into full baby mode and starts playing with adult-sized blocks, ringstacks, and plushies. They also have a round of video gaming on the latest console, the Pyrofox Station with the most ergonomic controllers paws can handle.

After suppertime, followed by bathtime, it's time for Xerry and Marshall to go to sleep. Marshall changes himself into Babygoo brand Care Bear diaper, then puts a pink diaper on his little sister. After the teen fox lays down in his cosy crib with its friendly star buddies on the mobile, Xerry climbs in and snuggles against his big brother. It feels so good to relive the old days. It doesn't matter that Marshall is bigger than Xerry, he will always protect him, play with him care for him. And when the summer is over, and Marshall is back in college, Mrs. Nuttkins will do her very best to help Xerry find new friends, so he'll never be lonely or scared again.