The main premise of it isn't new in anyway but it's a lot more innocent and cute than your usual seme/uke.
That said, the fact you're just thrown into a world where people are paired up at a very early age means we don't really get much character development between the 2 protagonists, at least not in a strong way and it just felt somewhat boring to me, and even the fact it's a partnership between two guys which is supposedly rare, the way the whole thing is setup means it, well, doesn't really mean much and everyone seems not to mind anyway, it could have been between a guy and a girl and it really wouldn't have mattered much for part of the story.
That being said, after a few chapters, new characters are introduced with their own set of circumstances that have a lot more going on for them, and later on we also get more back story on the main characters, filling up that void the early chapters were missing.
So basically, I enjoyed mostly the second half, and the first half felt somewhat boring to me, but that was still a decent read and the better second half somewhat makes up for it.

I don't think there needed to be an outright confession for this to be considered shounen ai. Alexi and Rael's feelings for each other are quite obvious by the end, and it was nice that the author used a more subtle style. A lot of different relationship dynamics were introduced to show the complexity of these supplier/receiver bonds. You really get the sense that it's just a completely different world where the usual affirmations of love are meaningless. I enjoyed reading this years ago, and it was still just as good reading it again. Also, Bikke's art style is one that I really like, and it certainly has improved since the time that this manga came out. I love the way that she draws her landscapes/architecture with as much detail as her characters, and I also love the choice of clothing for her characters. Her more recent works are gorgeous, and each of her manga have really unique stories so I recommend checking those out as well.

The summary sounds a little strange (and sexual), but the manga is actually very good. It's more about how important the people in a pair are to each other rather than a hardcore seme-uke yaoi (that my dirty mind immediately imagined), though you can see some shounen-ai in the manga if you want to. It's what I like to call "optional shounen-ai" - those who are clueless won't see it there since there is no declaration of love between the guys or anything more hands on than the necessary kisses, but those who know what to look for can see it and it's up to them (or the author) if they decide the guys are more than friends 😉 All in all, I can recommend this manga to everyone. It has a bit of drama, a bit of romance, sweetness and generally is a nice relaxing manga to read. *thumbs up*

Very cute story a nice fluffy read for anyone starting to get into the BL genre. However, the relationship between Rael and Alexi is never truly defined. They never confess their true feelings for each other everything is just left to assumption to the reader. And I truly found it hard to have ANY sympathy for Floran his character truly pissed me off he brought the whole situation upon himself. And if I was Gil I would have canceled our partnership, the whole situation was just ridiculous and really confused me on whether the relationship between suppliers and receivers were truly any special. The only relationship that is ever romantic is a heterosexual one and if your like me, I specifically read it because of the shouen ai genre.

It has a gentle, easygoing and calm tone throughout. I found it quite refreshing, without all the tropes commonly associated with BL, and I particularly liked how the relationships between the partners were still emphasised as being important in themselves without necessarily needing explicit romance.

This would be a pretty good introductory BL for someone I think, although any BL reader looking for something refreshing, light and non-cliche would probably enjoy this.

The art and plot was fantastic, but as a BL fan... When I see shounen-ai, I expect to see some romantic feelings between the main characters. There definitely is a sweet bond between Alexi and Rael, but I can't really see it being portrayed as romance, more like friendship.

I am reading manga since years and I think this manga could be rated all from shounen-ai, to only slash till even simply seinen. You could consider the main couple as lovers but you could also say that they are simply special to each other. Like others commented already, one of the plot basics is that partners are always special to each other. Some more, some less. Also the main characters don't seem gay, they are interested in females to some extent.
All over all it was a cute, fuffy and an easy read. Rather slow paced but sweet.

I disagree with some of these coments, for a shounen-ai there are quite a few romantic elements between the characters but some are just not as apparent as 'I love you!'
You can tell the characters have a deep bond with eachother and just because it doesn't say right out that they completely like eachother it still is rather noticeable.

The art is beautiful, the story is refreshing and one of a kind. I suggest you give it a go if you haven't already

I am so confused but can this even be considered BL? The manga itself said that lovers and partners are different. So technically they are kissing not because of love. o-O; so no actual same gender romance going on....?

It was a sweet manga but being categorized as BL, it came off as rather half-baked to me. Pretentious, even. While the concept is appealing, the recharging thing appears to me as nothing but a petty gimmick to make it seem Boys Love-ish (“two guys are kissing obviously they’re in wuv!!1!”) when in fact the involved characters’ feelings were not even further delved upon, leaving us to vague interpretations of what exactly the relationships here are. So right, actions do speak louder than words. I get that. However, the motives behind these actions - all the kissing from supplier to receiver and vice versa - do not seem to necessarily come in the form of romantic love, considering how a kiss on the lips is primarily treated as a means of life-support in the story. Never an act exclusive to lovers. The feelings could simply be platonic and that the relationships lean more towards friendship and dependency. For all we know, Rael and Alexi may end up as just heterosexual life partners like Gil and Floran while Alexi walks the same path as his dad. The manga makes you read between insubstantial lines, which is kind of frustrating when simple words of affirmation can be used.