Lala thinks about how to get Haruna closer to Rito, but Peke tells Lala she should worry about her own relationship with Rito first. Momo, prioritizing Lala as the first wife in the Harem Plan, decides to give Lala a lecture on love using a dating sim game. That night, Lala appears while Rito is in the bath and asks him for the "special kiss" that people who love each other share...

Since Yami always wears the same clothing, Risa and Mio take her shopping. However, her new and improved wardrobe prevents her from using her weapons properly. Haruna thinks she may have a stalker. Nana and Momo go to extremes to avoid studying the Royal Lineage of Deviluke.

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. 

Another suitor blasts his way into the picture, this time quite literally, as he wears an armored rocket suit.  He decided to cut straight to the point and keeps trying to snatch Lala.  Lala is able to dodge his attacks, but she finally get frustrated and fights back.  Wounded and with his armor damaged, he wander about, seeking advice from everyone, even Ren.  He comes up with a new plan to claim Lala and attempts to drug her.  

Things go awry when the group visits Saki’s private beach. Lala helps Rito study for an upcoming math test, but when the day comes, he cannot remember how to solve the problems. Lala tries to win Rito’s attention, but she is not having much luck.

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.

Haruna feels self-conscious about the size of her bust but ultimately decides that the quality of her character is more important than her exterior. Haruna finds a stray dog who turns out to be Rito. Mikan and Yami switch bodies to experience each other’s abilities.

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. 

Celine is drunk and spreads her pollen, making Saki and the others fall for Rito. Rito sets out to buy groceries and runs into Misa. After she takes him around town, he ends up not accomplishing any tasks. Momo mistakes an innocent message for something sexual and after a series of misunderstandings, Yui ends up with a nude photo of Lala.

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.  

Lala vows to help Haruna find love. Saruyama points out that Rito has changed since became close with Lala. An outing goes horribly wrong, and Rito chooses to give his own life for Lala and Haruna. During this time, he realizes that he loves Lala. Rito loves Lala. The problem is, he loves Haruna, too. Lala suggests that he marry them both.

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.