Ahhhh... Now I'm beginning to ship Umi more with Eri than Kotori. Maybe just lack of good translated doujin of KotoUmi? Most of KotoUmi I read are just plain porn without any good story to back it up (it's just not my genre). But lately, many EriUmi doujins just got my taste. Still, seing Umi as the agressor is a bit out of Umi's personality. Maybe a reversal would be good though. :3
I'm no Russian nor Japanese speaker, but I can say that Google Translate is more of a word for word translation. Not very suitable for translating sentences. Even with our native language, if you use it in translating to and from English, you'll get absurb results. Considering that our native language's structure is already a bit similar to English.
Whatever it is, this doujin is still awesome! :D