No matter how hard their friends try to help, Ikaros and Nymph just can't seem to crack a smile. After the Angeloids decide to work on the problem together, they take Tomoki out on the town for a three-way date!

Summer vacation. The entire New World Discovery Club heads to the beach. Tomoki is surrounded by attractive girls in their swimsuits, but ends up having to deal with Ikaros. Sohara explodes with jealousy as Tomoki has his full attention on Ikaros. Ikaros shows another frightening side of herself because of a small situation and the second Angeloid...

Long story short, Tomoki's house is destroyed. Wandering aimlessly, in search of a place to stay, Tomoki and Ikaros are lent a hand by the class president, Satsukitane. Sohara and Sugata join the mix as they are invited to the home of the town's #1 big shot. They are given a warm reception. But, when they wake up in the morning, there's an angry mob with them!

After surprising Tomoki with a sudden farewell, Ikaros endures a treacherous encounter with Harpy and Gamma. If Ikaros can find a way to defeat them, she may finally break her chains and find the happiness she desires.

Tomoki's on a mission to sneak into the girls' bathing area. With Sugata's assistance (and one of Ikaros's cards) he devises the perfect disguise to accomplish his goal: he transforms into a cute girl!

Tomoki and the gang go to an outdoor BBQ. Tomoki tries to open a stall to make some money, but no matter what he does it fails. Then he gets Nymph's help to open a host club! Meanwhile, Ikaros is trying to act like a human for Tomoki's sake when she hears the words "It's human to lie."

It's a musical showdown at the Cultural Fair! Ikaros is the star of the show when Tomoki and the gang put a band together and take on the classical orchestra of the nearby private academy!

Tomoki, suffering from a never-ending amount of math homework, decides to have Sugata-senpai help him out. President Satsukitane leads him to Sugata's home, only to find that it's a tent pitched next to a river! Tomoki and the gang have fun camping next to the river after finishing their homework. Ikaros is told to go shopping for ingredients when they all decide to make curry, but...

Tomoki has another dream where the mysterious angel warns him of another Angeloid and after revealing the information to his friends, Nymph suggests they visit his dream via Dive Game which enables them to visit humans' dreams. The group, consisting of Tomoki, Sugata, Mikako and Suhara, leave into the dream to find themselves confronted with each other's dreams and an embarrassing revelation for Suhara. Ultimately, they are unable to visit Tomoki's dream and instead land on a bizarre world with a pillar with illegible words and hibernating evergreen trees. They return with more questions than answers and Sugata finally remembers a forgotten memory a year past when Ikaros first fell onto the Earth and winesses Astraea's arrival.

Winter comes to the city and Astraea is still far from completing her mission of eliminating Tomoki. Mikako reels her into another of her sadistic tantrums and stages a mock battle between the girls and boys of her school by appointing Tomoki as the general of the boys' group while acting as the general of the girls' group herself. This time, she entices Tomoki to fall into her trap by putting up the reward to be able to do anything to the losing team. Nymph still yearns for a new master and Astraea faces a dilemma when she is unable to dispatch Tomoki due to his question to her actions being her own choice or not.

Tomoki makes a splash with the girls in swim class when he transforms into pool water. Later, the whole gang heads to a wedding - but who will be walking down the aisle?

Tomoki, much to his irritation and confusion, finds himself aroused by the antics of Ikaros and Nymph. This disturbs him greatly so he leaves for the mountains to train in the Zen monastery. At the same time, Astraea, the new angeloid lands at the monastery to dispatch Tomoki while Sugata informs the rest about her. Nymph and Ikaros ignore the threat calling Astaea an 'idiot' and leave Tomoki alone who himself is finding trouble ridding himself of his 'earthly desires'. Later, Sugata discovers Astraea and learns of the threat to Tomoki's life and more information on Synapse, the world where Angeloids come from.

During the Summer Festival, Mikako organizes a fishing contest at the swimming pool. There's only one way to win: reel in the curviest catch! Later, Ikaros tries to find the best way to spend her allowance.

After unexpectedly divulging information of her assignment, Astraea attempts to attack Sugata to keep her secret safe. Unfortunately, she falls into the hands of Mikako, who upon seeing the gullible nature of the new Angeloid, fools her into joining a wrestling match at the local festival. Much like last time, Mikako entices Tomoki to join by putting up a prize of ten million yen and a chance to bathe with her family's geisha. Nymph wrestles with her emotions after losing her wings and master and finds herself yearning for a new one, Tomoki being her new candidate.

Sohara teaches Ikaros about the ins and outs of marriage. Meanwhile, Tomoki puts the final touches on his summer project: a massive network of periscope-like tubing that allows him to sneak a peek at girls all over town!

Sugata and Sohara travel to Synapse with the aid of Nymph. Sohara accidentally drops an object onto the world below which falls into the hands of Tomoki who fashions it into a pedal bike that transforms into a robot. At Synapse, the two humans learn new details about the New World while Tomoki relishes his time with his new toy to satisfy his perverse actions. Sohara later destroys the toy and a new Angeloid is revealed post credits.