Lala and all of this marriage stuff are driving Rito insane! At least he can catch a few hours of sanity alone at school.  What?!?! Lala is the new transfer student?! Even though Rito implores her to keep a low profile, her antics are making her rather popular.  Even worse, Haruna has just said that she thinks Rito and Lala make a good couple! In an attempt to cheer up Rito and teach Lala more about earth culture, Mikan decides they should go on a tour of the city.  Disaster is narrowly averted following a literal wardrobe malfunction and Lala's inventions at the aquarium.  Oh, and Haruna ends up joining them on their outing which could be the beginning of a love triangle.

Yuki wakes up to Haruna and Lala yelling at him that he is about to miss the ship. Lala decides she can't marry unless he wants too.

Rito receives a message from the King of Deviluke which orders him to board the Devilukian spaceship as he has to prove he is the best in the universe. Before boarding the ship he confesses his feelings for Haruna.

Lala's personality changes due to a fever. Rito now has to deal with Lala's constantly changing personalitues and her desire to take over the world as a deviluke princess.

Saruyama wishes that he was a nobleman from the Edo Castle. He then starts to daydream about being the ruler of Edo Castle.

Everyone is upset by Yui's submission of what they should do for the culture festival. She submitted that they do a region research display or a calligraphy display.

Yuuki hears about an alien hotel being run by Mikade-sensei and Kimio. There Yuuki decides to try it check it out via the old school building.

General Mojack decides to try and take over the world so Kirisaki takes it upon her self to destroy him by turning into Magical Kyoko Flame.

Things go from bad to worse for Rito.  First, he has a bunch of aliens show up, and then he finds that he's engage to a galactic princess, now the girl he really likes is mad at him? How could things possibly get any worse? Oh, well, having Lala's father blow up the earth would be pretty bad. Rito has only three days to set things right and prevent King Deviluke's wrath over a broken engagement?

After seeing a commercial on TV promoting a hot springs, Lala tells Rito that she wants to own a hot springs. Lala then proceeds to build her own hot springs right in her own backyard.

A space ship flies over the school and drops off a package for Lala on the roof. Inside the package is a pregnant wolf that jumps out and tries to kill Lala.

Rito and everyone decide to go to the old school building to find out if the rumor of a ghost haunting the building is true.

Everyone decides to have a fun afternoon together at the water park.  However, Rito now has a new source of relationship drama: Run has fallen in love with him, too.  Through their whole afternoon, she tries everything she can imagine to get Rito’s attention.  From fishing poles to vacuums and even fabric-eating fish, each of her attempts ends in disaster for Rito.  She finally gets some advice from Montemitsu and Rito’s teacher, but finds herself in a spot of trouble with the other patrons of the park.  Rito steps in to help her and Lala whips out one of her new inventions.  Unfortunately for Rito, this is only the beginning of Run’s campaign for his affection.

Rito, Haruna, and Lala are moving up in the universe, when an alien prince visits and they each become Ambassadors of Peace from the Earth.  They get more than just their titles, but a challenge to compete for the title of Greatest Hunter in the Universe.  This could be a big opportunity for Rito in reaching his goal of become the greatest man, so they compete.  After an adventure filled with dinosaurs and giant gorillas, Haruna wins the title, while Rito finds a group of Amazons who want to all marry him. 

Rito is training hard to hopefully become the Greatest Man in the Universe and save his life in the process.  While out running, he bumps into Haruna walking her dog.  She becomes very supportive of Rito, even meeting up with him everyday as he runs.  Finally, Haruna asks Rito to have lunch with her by the river.  During their date, her dog falls into the water and is rescued by Rito.  Dripping wet, Haruna takes him to her house to dry his clothes.  There, Haruna trips and almost kisses a towel-clad Rito just as her sister enters the room.

Rito is about to have the worse ‘meet the parent’ experience in the whole universe! Lala’s father, King Deviluke is coming to earth to see if Rito is worthy of being his daughter’s future husband and eventual ruler of their planet.  At school, Rito meets a strange girl on the roof, who turns out to be Lala’s father testing him.  Having made a very bad first impression, it looks like Rito is about to learn about intergalactic pain, until Lala steps in.  Now, Rito is left with only one option to save himself and the earth from total destruction: become the Greatest Man in the Universe.  

The athletic festival has arrived and Rito is in the lead to making a complete fool of himself.  He’s trying everything he can think of to impress Haruna, but keeps accidentally bumping and touching her.  While Rito is pretty sure that Haruna absolutely hates him, Lala finds herself in competition with Saki, who still wants to beat her.  The only person who seems to be really enjoying themselves it the principal as he watches the female students go through bizarre and perverted contests.  

Rito encounters a golden haired girl on street.  They begin to talk and Rito buys them taiyuki when suddenly, she attacks!  It seems that both her hands and her golden locks are weapons.  Rito tries to run away, but she pursues him.  It turns out that she is an assassin, know as Golden Darkness, hired to kill him.  Zastin comes to rescue Rito, but this girl is more than he can handle.  Lala shows up, and the girl fight is on. 

Lala’s fan club president, Stella, shows up, trying to convince her to return to make an idol CD.  Stella becomes upset when she finds that Lala is engaged and refusing to go.  Rito is held responsible for this, and must find a stand in actress to pretend that she is Lala.  Rito becomes upset when Stella decides that Haruna would be the perfect double for Lala.

Rito is a shy boy just trying to get through life and pluck up the courage to confess his love to his long time school crush. Of course, the universe seems to be against him, even to the point of dropping a naked runaway alien princess named Lala quite literally into his lap and bathtub. As if things couldn't get stranger, in the suds and confusion, Rito now finds himself engaged to the girl who fell from the sky.