Urusei yatsura - Season 4 (1982)

Onsen's had it with his students' shenanigans, and he's threatening weekend detention if they make so much as a peep in class. The class is determined to avoid detention at any cost, even as Ten shows up to harass them.

Lum's father got kicked out of the house for greedily eating both his and his wife's food. He has to crash at the Moroboshi's on Earth until things blow over, but now the big guy's eating them out of house and home.

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Ataru confides to Megane that he is "giving up", and has chosen him as successor. Megane is elated as he imagines having Lum all to himself. Shinobu, having overheard their conversation, imagines that with Ataru out of the picture, there would change in the class' balance of power would result in her losing Mendou to Lum, causing repercussions far beyond Tomobiki High. She then conspires with the popular girls from the surrounding schools to stop Ataru and protect the status quo.

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Lum and Ataru's relationship becomes strained after she forgets his birthday.

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Ataru, Lum, Mendou, Shinobu, and Ten are invited to a creepy old seaside inn for dinner. Little do they realize that they are intended to be dinner.

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Ten's mother comes to Earth to visit him, but he's absolutely terrified. His mother is ironically a firefighter who's passionate about her job, responds to fire bells almost instantly, and deals with arsonists with sadistic brutality.

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