If you liked the Loveless anime, the Anime-Planet community thinks you'd like:
For the past five years, Tetsuhiro has had an unrequited crush on his friend and co-worker Souichi. However, there's a problem – Souichi is a homophobe who is disgusted at the thought of two guys being together, especially since his younger brother eloped with another man! As time passes, the two spend more and more time together and Tetsuhiro's feelings grow stronger. Will he muster up enough courage to confess, and more importantly, can he change Souichi's mind about masculine love?
The first thing you'll notice is that Soubi from Loveless and Souchi Tatsumi looks alike. Although the similarity between these characters, the stories have different tastes. Both series are worth to watch and if you are into Tatsumi then you'll fall for Soubi.
Like the person before me has said, the two characters, Tatsumi and Soubi look EXTREMELY similar. That given, the two anime don't really have much else in common; they are both shounen-ai, however Koi Suru Boukun is more Yaoi whereas Loveless isn't.
For Kouta and Yuka, finding the bloody naked young girl on the beach would change their lives forever, for better or for worse. Unable to speak or function as a normal human being, she is named Nyu by the duo, and taken into their home in an effort to save her. But what neither teenager knows is that this innocent young girl is actually a killing machine -- an experiment gone terribly wrong -- and it is only a matter of time before the murderer in her awakens again...
Both anime are somewhat mysterious and have some rather deressing themes. Fans of Ritsuka will enjoy the character development of Lucy in Elfen Lied. A word of warning: both anime have fighting; however Elfen Lied is far more graphic than Loveless.
The Holy Grail War is a battle between seven magicians who each summon a mythical hero to fight for their cause. Shirou, a twice orphaned high school boy, had so little magical talent that his foster father did not bother teaching him about the war and its meaning. Thanks to that lack of foresight, Shirou finds himself in a bit of a pinch when he accidentally summons a hero of the strongest class, and is sucked into the fray. The Grail grants the winner any wish they have. But driven by an unyielding sense of justice and self-sacrifice, for what will Shirou fight?
In both shows, an unsuspecting boy is thrown into a bizarre world of fighting due to the lifestyle of a dead relative. Both of these shows involve groups of fighting pairs who have a master/servant relationship, with the fighter exerting the effort while being subserviant to a master who can aid in battle by increasing the fighter's strength and giving orders. In both cases, the pair is bound together by some deep destiny and their bond allows them to connect with each other on a more spiritual level. The fighting is similar too, involving magic and complicated relationships with people who are supposed to be enemies. The two shows are dark and bittersweet and overall have many similarities.
Tohru Honda is a compassionate girl who is down on her luck. Her mother having recently died, she has been forced to camp out in the woods for shelter. However, things start to turn around once she is invited to live with class hunk Yuki Sohma and his family... but all is not as it seems! Yuki's family is burdened with a dark curse which causes them to turn into the animals of the Chinese zodiac once hugged by a member of the opposite sex... and Honda may be the only one who can help them.
With both Fruits Basket and Loveless you will find that the humans have animal characteristics-although Fruits Basket's case it's just the Sohma family members whereas in Loveless all humans are animalistic.
Anyways, they both have dramatic themes that are lightened by comedy. Loveless is a little more heavy with the drama than Fruits Basket, though. Also, in both series the characters are equally compelling and make you actually genuinely care for almost all the cast.
A young boy named Ryo perished in an accident long ago, and at his parents’ wishes he lives on through an android named Suzu. He must regularly have Ryu’s memories artificially injected into him, and undergo a series of tests at the personality plant he resides at. During a session testing his motor movements, Suzu loses a baseball inside another building and goes exploring; there, he meets a young girl of the same age named Hotori. Though Suzu is an android, he still is able to present human emotions, and feels disheartened when he learns that Hotori rarely leaves the room. More importantly, Hotori suffers from a disease in which her memory rapidly deteriorates. Suzu and Hotori soon form an intimate bond, and question what it really means to live.
Those two have a lot in common. Both show how our memories create who we are and how losing them makes us fell anxious about ourselves. Also, they both have very similar ambience. However, while in Tada Saiwai... there is shown a frienship between a young boy and girl, in Loveless it's a relationship (or friendship, call it whatever you like xD ) between two guys.