Rito Yuki is a bumbling boy who wants nothing more than to confess his love to the lovely Haruna, but a variety of obstacles always seems to stand in his way. One day, while relaxing in his bathtub Rito found his hands full - literally - with the breasts of a strange alien girl named Lala who suddenly appeared in his lap! She is the princess of Planet Deviluke, and she has run away from home to escape the prospect of an arranged marriage; and unfortunately for Rito, his accidental groping is the traditional engagement ritual of his otherworldly guest! Deviluke's emperor will destroy Earth if Rito backs down from his "proposal," but all he really wants to do is be with Saruyama! Naked antics, magical powers, misunderstandings, Lala's marriage-happy family and Rito's own shyness are many of the barriers he must face in his attempt to win the real love of his life – that is, if Lala doesn't win him over first!
Both have similar stories beginning when an alien girl suddenly drops in on a normal High School boy. In To Love-Ru it was the alien princess Lala and in Asobi ni Iku yo! it ended up being the cat girl Elis. Both shows feature an eclectic cast of females all trying to make the lovable loser their own. Same ecchi comedy and both are easy watches since neither of them build up a complex plot of any kind.
Both of these anime are very similar, in the plot: a normal boy living his normal life until he finds a busty alien girl that is in love with him.
For short - If you like/liked on you'll definetely like the other.
Both stories have an alien girl randomly show up and stay at a guys place, they both have a very similar feel when you are watching them, if you liked one you will like the other.
The main characters of both series are bombarded by busty alien girls who seek to mate and marry the male lead. Asobi is a little more ecchi while To Love-Ru is a little more funny. These two are a lot alike and if you've enjoyed one, you're going to enjoy the other.
Yuuto Amakawa has had a tough life. Seven years ago, both of his parents were tragically killed in a car accident, leaving him without a single living relative. His friend Rinko Kuzaki has taken care of him every since. Yuuto's sixteenth birthday has arrived, but instead of a birthday gift of a normal life he meets Himari, a catgirl samurai who swears to protect him. Within weeks Yuuto's life is thrown into chaos as his family's dark past comes to light. With demons appearing around him, Rinko and Himari fighting for his attention and a sinister plot beginning to surface, can Yuuto live the normal, safe life he wants so badly?
If you liked Omamori Himari you'd like Asobi ni Iku yo! (and vice versa) because both of them have Catgirls, and girls fighting over one guy. Both have action based story with good bit of ecchi/comedy scenes.
Both animes have a similare feeling and they both feature cat girls and the rivaling around one charachter.
Three years after an accident that nearly left him for dead, Tomoharu Natsume is about to start his high school life. Though with a ghost named Misao following him around, Tomoharu is far from being an average teenager. One day a strange woman appears and gives him a trunk that contains a tremendous power. This power is known as an Asura Machina - a being that draws its strength from a human sacrifice - and the sacrifice within Tomoharu's Asura is none other than Misao. As the bearer of such a power, Tomoharu immediately becomes the target of various groups, including the Divine Guards, who want his power for their own. When Tomoharu befriends a demon called Kanade and she is captured by the Divine Guards, he joins the Dark Society in order to save her. Now, Tomoharu will have to fight alongside the Dark Society while he tries to find a way to save Misao and bring her back to life.
Both of these series start out with a lot of interesting groups and genres mixed together... but then fail to deliver and end up being a mostly average ecchi show. If you enjoyed one series you'll likely enjoy the other.
Sadness be gone! Though depressed people are scattered across the world, there are those from a parallel world that are here to help. Known as Juuden-chan, these busty ladies use their special powers to charge up the mentally dejected and earn a living in the process. Aresta and Plug are two Juuden-chan who, while performing their duties, discover a boy named Sento. However, he’s different than most humans: unlike the rest of mankind, Sento can actually see them. Now, in addition to their duties helping the depressed, Plug and Aresta must juggle watching their favorite hentai, getting into trouble, and being hit by Sento’s bat which causes them to urinate and become aroused. Perversions abound for these two rubber suit-wearing, otherworldly beauties!
Asobi ni Iku Yo! and Fight Ippatsu! Juuden-chan!! are two very fanservice-y series that involve extra terrestrial beings. Or at least life forms that do not originate from Earth. I do think you'll like one anime if you enjoyed the other because there are some similar issues that arise in both anime. Both series touch upon science fiction elements whereas Asobi ni Iku Yo! features some cool gun-action and Juuden-chan is a lot more silly. You also have these girls in skin-tight "space" suits while at work. The main guy somehow gets involved in outer-Earth missions and that's when more powerful forces take interest in him. I think Juuden-chan takes a more "ecchi" role with its urophilia while Asobi ni Iku Yo! takes almost every opportunity for nude shots. Take your pick.
When the infected approached Rei and Takashi's school, it led to a gruesome blood bath that left the majority of students and staff dead or turned into the zombie-like monsters that have spread throughout the world. Together with a handful of other survivors, Rei and Takashi set forth to find their families in a world that is rapidly detoriating. Governments have collapsed, the killer disease is out of control, and people everywhere are trying their best to simply live through each day...
Action, ecchi and the harem elements are similar. Despite the difference in the base genre(scifi vs horror), the plot and characters have more in common than the typicall highschool ecchi show in that school life actually plays a minimal role.
Overally HSOTD is better, mainly because the cookie cutter love polygon plot is in the background wehreas it takes center stage in Asobi ni Iku yo just as it does in most ecchi shows.