That's actually not the debut work by Leafy, at least not in the hentai business as he previously appeared in Comic Lo and Comic Europe (why name a magazine Europe which isn'r available in Europe?)...
With a title like that, especially the word 'secret', plus the Vanilla tag...I'm sure it'll be a very nice secret. Taciturn...So basically a Kuudere? It's always nice when a usually cool and reserved girl shows a different expression, especially during sex in Hentai.
A simple enough story, but still a really nice read! Sweet, sweet Vanilla is always great, after all.
Great ending too.
From the preview in the Comic X-Eros #52 thread I actually thought this would be a femdom release with the girl enjoying it to tie him up and ride him like a mechanical horse. Although I'm a bit disappointed in regards of the lack of femdom riding I'm still happy in regards of female lead cuteness..
Then i was amazed at how cute she was afterwards. Bless stoic turned lewd girls