While Ronnie Anne and Bobby hang out in the mercado, Rosa is seen chasing after Carl, who’s trying to get out of studying for his test. This makes Ronnie Anne bemoan that Carl has it easier, because of how the schoolwork she's doing is harder. Suddenly, Hector arrives and informs the two that they should be lucky that they go to school because when he was younger, he put a lot more focus on running his first business that he didn't complete his schooling. When Hector comments that he wishes he can go back to school to complete it, Ronnie Anne and Bobby encourage him.
The next day, as Ronnie Anne and Carl get ready to leave, Hector arrives and states that after chatting with Chavez Academy's principal, he can come to school alongside his grandkids. However, upon arriving to school, he becomes an embarrassment to Ronnie Anne and Carl, such as:
farting in class,
calling on Ronnie Anne to solve math problems,
revealing to the students that the tortas Carl sells are a week old,
getting Ronnie Anne in trouble for passing a note revealing some gossip about their teacher,
telling Carl about his spare pair of choo-choo chonies,
revealing an embarrassing picture of Ronnie Anne as a baby in front of the class during a family tree project.
Later that night, Ronnie Anne and Carl are annoyed that Hector is ruining their social status at school and need a way to get him away from school. The next day, Ronnie Anne and Carl attempt to get rid of Hector in any way they can.
They first attempt to have Hector's band booked for multiple events, which works at first. However, not long after, Hector arrives back to school, due to Rosa cancelling his plans.
Ronnie Anne and Carl attempt to make Hector win Amores Pizza's raffle for a free trip to Italy by rigging the vote with hundreds of votes with his name, but Vito's dogs, Big Tony and Little Sal, eat up the Hector votes and replace them with their own votes, making them and Vito the winners.
Ronnie Anne and Carl attempt to trick Hector that he has lice by pouring rice all over his face. However, Rosa is quick to point out the mix-up.
Realizing there's no other way to get rid of Hector, Ronnie Anne resorts to more drastic measures.
The next day, Frida arrives at school to inform Hector that there's a massive mix-up at the mercado and needs his help. Later that day, Ronnie Anne and Carl are satisfied that they had a good school day, but when they arrive to the mercado, they realize the mess they created when they see the store swamped with boxes of items the store doesn't sell, lobsters on the loose and customers having no idea where they are. This causes Ronnie Anne and Carl to realize that they're crushing Hector's dream of going to school, since he's once again putting more focus on running the store like he used to. Ronnie Anne and Carl confess their actions, and while Hector states he's disappointed that they did this to him, he's at least grateful that he isn't at school, since his experience was actually difficult. At that moment, Rosa arrives to reprimand Hector for ditching school, causing Ronnie Anne to get an idea.
Sometime later, Rosa has decided to become Hector's teacher, as she decides to homeschool him. Hector writes Sergio a note and Rosa catches him trying to pass a note during their session.
The premise of the episode is similar to The Loud House episode "Making the Grade" as both episodes are about a relative joining the main character's class and destroying their social life by their antics.
This is the first episode in the series to have a diacritic in its title.
According to Hector, he never finished schooling because of how much dedication he put into running the first business he opened.
This episode reveals that one of Hector's ancestors was Chinese.
Carl is secretly revealed to sell week-old tortas (sandwiches) to students under the impression that they're freshly made.
The music of the title card is a Colombian cumbia.
This episode reveals that Hector takes medication for gas.
Sergio is revealed to be at least 55, since he was alive when Hector (who is 66 now) was about Ronnie Anne's age.
Señor Class - The title of this episode is a reference to "senior class", the highest class level in high school or college.
Four Weddings and a Funeral - Hector references this 1994 British romantic comedy by commenting that his band has been booked for three weddings, four quinceañeras and a funeral.