This is a signed book by Nekotoufu-sensei of "Onii-chan wa Oshimai!" which I have carefully stored in a dark place. It is volume 30, which was published at Comic Market 104. The illustration features a deformed Mahiro Oyama. Please note that the maple leaf illustration in the fifth photo is a reproduction. I love Onimai and have a large collection, but this is the last signed book of Onimai that I will be selling. Thank you.