First of all, the story starts like in most yaoi one shots: confusing and going straight to "business", as it progresses the outcome reveals himself quite predictable, but anyway it's very enjoyable.
Art is pleasant, the backgrounds surely must have been hard to draw, lots of details, objects, etc.
Characters. Felt good to see something knew, Hakuou isn't your ordinary uke, it's my first time seeing a granpa getting "attacked". For the rest, it's just normal standards.. A super smexy seme, and two minor characters(daughter, grandaughter).
Light, fair, it does entertain.. and there's more apart from this!!
