Rather than being something to critique by itself, this short work of art proves itself to be the perfect advertisement for the enchanting manga of the same name, as it was the cover art of the manga that caught my eye to begin with.
There is, however, something to be said about the outstanding visual and audio directing put into this OVA; to be able to convey emotion without expressing it in words is a gift, and this nails it. From the sprinklings of delicate orchestral pieces to the dedication of sticking exactly to the manga art whilst adding a dash of colour works perfectly to give the audience the feeling of warm solitude. Without ever uttering a single word you learn Shiva and Sensei's bond, what they value, how they see things, what scares them, and most importantly what they want the more than anything.
If this OVA peaked your interest I implore you to read the manga, it will be worth you time.
