Somehow, I'm not surprised to see that there are no reviews for Sore wa Tada no Senpai no Chinko. It's quite difficult to put such a bizarre experience into words; and when I saw bizarre I MEAN it. But I'll do my best to try anyway.
Senpai no Chinko is exactly what it says on the tin: a collection of short stories that take place in a world where dicks can safely grow back after being chopped off. Yes, you read that right. But what makes Senpai no Chinko so uniquely strange isn't its odd premise as much as it is its approach to it: this manga does not address it with gore and horror subtones, nor does it go straight to slapstick comedy, but instead establishes itself neatly as a slice of life. This is a stylistic choice from the author (also seen in the equally outlandish Daidai wa Hantoumei ni Nidone suru) that works wonders for me; he takes violent, fantastic and absurd situations and makes them absolutely mundane. It is no big deal that girls are walking around holding amputated dicks in this world. It's just commonplace; it's how it works, it's the rules. They talk about it with their friends. They go to stores specialized in dick-chopping. You sort of just accept it.
I suppose you're thinking that there is no way to make something so horrific-sounding look ordinary or even cute - but trust me, this is easily achieved through some very interesting means. Firstly, the dicks don't really look or "behave" like dicks. They're more like little sentient alien blobs than severed genitals. You might even find yourself thinking they're cute here and there. Moreover, there's an absence of gore, so you don't really see the act of chopping them off happening - the most you see is the tool used for it, a urinal with a guillotine blade. Yes, I am serious about this. The tone is also constructed around the fact that most of these stories ARE mundane: a high school girl in love with her upperclassman, a girl having relationship trouble with her boyfriend, conversations between the guillotine shop owner and his clients. The wacky setting is simply inserted in these slice of life bits, adding a delicious dose of absurdist comedy to the mix. Senpai no Chinko doesn't need to resort to slapstick and loud jokes precisely because it finds humor in its own existence - the situations are carried out naturally, and they simultaneously take themselves very seriously and not seriously at all. Another thing that helps is the art itself: the girls look cute, the dicks look innocuous and the backgrounds and scenery look appealing in an almost cartoonish way. It ties it all together perfectly.
The downside to a manga like Senpai no Chinko, though, is of course the fact that it's a short collection of stories. It's very short, so there isn't too much room to explore more of what's going on - although this might work in its favor, since too much of it could've made it tiresome rather than fresh. And since each chapter tells a different tale, so you're bound to find some chapters funnier and more entertaining than others. They're all good enough to make it a consistently fun read, but that's that. Its format is perfect for it, but at the same time slightly limiting. So Senpai no Chinko is a good, humorous and unique manga, but it's hard to say it's anything grand.
Ultimately, you might find yourself wondering if there's a deeper meaning to this manga, too. If the dicks and the dick chopping are a metaphor for something, and if you should be looking at it with a little more of insight. To me, personally? It's not worth wrecking your brains over it! Sit back, relax, and take it for what it is. You might find it to be surprisingly meaningful depending on your own view on it; but at the end of the day, I believe the true purpose of Sore wa Tada no Senpai no Chinko is to give us a good laugh and an enjoyable time. So if you have some time to kill and feel like dabbling into something a little different, this is just the thing for you!