This one's kind of disappointing. The characters are extremely OOC here. If anything, Hisoka should be enjoying this with a devilish grin on his face over the fact of being dominated, or else be uninterested, if you want to interpret his character as not caring about sex. He should absolutely not be blushing with tears streaming out of his eyes. Bisuke should be either a child or hyper-muscular, but she looks like a regular woman here. Also, she's behaving like a generic dominant character, which would be fine if she were in her muscular adult form, but she's in some intermediate form here that we've never seen before. If she were in her child form, she should be expressing some kind of exaggerated childlike glee and lust. The author of this is a frequent yaoi artist, so unfortunately she just chooses to play to the typical seme/uke conventions. A shame, because Bisuke/Hisoka is such a great idea for a doujin.