First of all I wanna say that this anime is shit but it's also a great anime to watch. It's so bad that it's good.
The relationship : It's a romance between a dad (but is in reality his biological uncle) and his teenage son. It's both incest and pedophilia. What an amazig start ! There are some h-scenes which are hard to watch, cause incest you know. And to add salt to injury, this is a love-triangle ! The last one is a classemate of Mira (the child), who in the second ep rape him, that what I call a healthy relationship between friends. It's already bad but the dialogues are just sh*t. Mira's voice will make you want to punch him and he says so much horrible stuff that makes you question his sanity. The dad/uncle is not better, raping his "child" whenever he wants.
The art : It's really bad, sometimes it's tolerable but no.
So why watch if : the story, characters, voice acting and art are bad ?
If you're alone DON'T BUT with friends DO. I had so much fun watching it with a friend, it's always better to suffer with friends.
Making a bad yaoi bingo/drinking game is also a good idea to enjoy this anime