There was a time when Todomatsu, the one considered the coolest of the sextuplet, was invited to a mixer and had to make the hard decision of taking with him one of his beloved brothers or one of his many friends. That was the day when Todomatsu picked Atsushi over his brothers… and also the day that marked the beginning of Todomatsu’s relationship with the popular and socially functional Atsushi. Indeed, AtsuTodo is one of the most loved shippable couples in Osomatsu-san, and it is not difficult to understand why. The two characters are said to be completely opposite and complementary. Atsushi – with his car and all the ladies who crave for him – is the perfect product of the Japanese capitalistic contemporary society, while Todomatsu is a NEET who hasn’t achieved anything in his life and a clever liar.

As a natural consequence, they couldn’t be other than the perfect match in the eyes of the fans, who like to imagine Todomatsu obsessed over the thought of the mysterious and charming Atsushi by whom he desperately wants to be noticed but also feels inferior to. Unlike Atsushi, Todomatsu has no particular status and is surrounded by those weirdos of his big brothers who he is incredibly ashamed of. Atsushi has only appeared for just a few minutes in a single episode of the series and been chosen by Todomatsu as his date, Atsushi and Todomatsu’s background leaves a great amount to imagination. This is why they could make it at the fifth position of our list.

It is nothing new that Ichimatsu has trouble making friends and that the only living beings he can interact with are his affectionate and fluffy cats. Indeed, Ichimatsu is so reserved and insecure that for him, it is even hard to get along with his own brothers, whom he follows everywhere, but with whom he rarely has calm conversations with. However, there is someone Ichimatsu isn’t scared to show his own self and feelings to, and that someone is his brother Jyushimatsu. The opposite to Ichimatsu, Jyushimatsu is crazy, simple, pure, and does really care for his brothers who, for him, are the most precious things. In particular, Jyushimatsu is extremely worried about the fact Ichimatsu can’t make any friends to the point that he also asks for Dr. Dekapan’s help in order to make Ichimatsu’s life less lonely.

This particular and deep bond between the two brothers has triggered the enthusiasm of many fans who started to imagine something more for Ichimatsu and Jyushimatsu other than a simple family relationship. The timid and aggressive Ichimatsu becomes another person when he is around Jyushimatsu, and Jyushimatsu will do anything to make Ichimatsu happy, even pretending to be his dog! Their give-and-take connection has been breeding ground for tons of sweet and lovely fan fictions and doujinshi, and could absolutely not being left out our list.

There are very few serious episodes in Osomatsu-san, but when the ninth episode was aired, it definitely was jaw-dropping. It isn’t rare for the six brothers to get obsessed over the many beautiful women that appeared during the series, but the only one of the brothers who lived an intense and touching real love story was the loony-tune Jyushimatsu. Indeed, in episode nine, we see Jyushimatsu who deeply falls in love with a girl – nicknamed “Homura” by the fans – that was about to attempt suicide due to a quite troubled past. The girl, who is also the one who saved Jyushimatsu after he passed out because of an accident, becomes Jyushimatsu’s new reason to live. However, in the end, destiny forces them apart.

Many have been moved by Jyushimatsu and Homura’s brief but intense love story, so much that JyushiHomu is now one of the most clicked Osomatsu-san couples on websites such as Pixiv and Tumblr. High are the expectations to see Homura appear again in the future of the series, and they can be perceived by the huge material in circulation on the Internet that is about them being finally happy together. In the hope that fans’ wishes will be granted, we encourage Jyushimatsu and Homura’s innocent love by placing them at the third position of our list.

If there is a couple whose members can be defined “perfect for each other” that is OsoChoro. Why? Because Choromatsu is the ideal tiresome waifu that the laidback Osomatsu could dream of. In an anime like Osomatsu-san where everyone is crazy, has special powers, or has a nonsense personality, Osomatsu and Choromatsu are the only two who seem to be quite normal. Indeed, unlike his brothers who have quite weird dreams, Osomatsu is just a simple lazy pachinko-addict who wishes to survive somehow in future without having to work. Choromatsu’s secret dream is not so different from Osomatsu’s, but at least he is upright enough to understand that he will have to roll up his sleeves, someday.

Choromatsu’s concern for the future is what necessitates him to scold Osomatsu who, on the contrary, couldn’t care less. Indeed, all of Choromatsu’s attempts to open his brothers’ eyes fail miserably throughout the series--even though they were able to pique fans’ dirty fantasies, at least. The leitmotif for OsoChoro is, in fact, all about Osomatsu imposing his slackness over a reluctant and annoyed Choromatsu who would like his brother to get back to the reason. In the guise of a cute married couple whose dangerously layabout husband only wants to have fun with his troublesome darling, OsoChoro deserves to be at position number two.

Do you think that this list missed a bit of rage and roughness? Well, we just saved it for first and that is the hottest couple in Osomatsu-san, namely IchiKara. The reason for the great success of this couple is not hard to imagine, and it lies in the ambiguous and aggressive relationship between the second and the fourth born of the sextuplet. Karamatsu girls know that the absolutely not charming, painful, and extremely narcissistic Karamatsu is a pure and simple-minded guy who constantly looks after his brothers and whose only objective is to appear cool in the eyes of the ladies. On the contrary, Ichimatsu is shy, cold-hearted, misanthrope, hides sadomasochistic tendencies, and hates Karamatsu so much that he doesn’t even care when he receives news that Karamatsu has been kidnapped by Chibita.

Their absolutely non-matching personalities and their constant beef are two of the cornerstones of the entire series, which– for some people – is also the reasons why an anime like Osomatsu-san could work so well. There are many theories about the causes of Ichimatsu hating so much on Karamatsu and they inspired hundreds of fanworks in which Karamatsu is the poor sexual victim of an Ichimatsu who loves him to the point that he can’t stop himself from being violent with him. Whatever is the reason for Ichimatsu to be so angry with Karamatsu, we are certain that IchiKara hardcore relationship is the worthy winner of our Top 5.