Excellent so far, I only really have two elements which are negative so far so I'll start with those:
The content so far is present, but it is at roughly the first third of Asuna's corruption. So the first blowjob has been given but it is not common yet, groping has occurred and there are good scenes, but it is not close to being finished.
Secondly, the translation is not done by a pro and this is mostly apparent in some text boxes not being translated as well as some bits and pieces being translated weirdly. To be fair, roughly 85% is properly translated into english and most of the translated text is understandable, but if you can't stand fan translations or some errors/untranslated text don't play it. Perhaps bookmark it if in the future it is fully translated. On the other hand, this is not MTL, so the English understands what it is trying to say.
Moving on from that, the core of the story is that Kirito and Asuna are dating and are trying out a new online VR game wherein they meet a classmate, who has the hots for Asuna and resorts to a combination of emotional manipulation and some in-game events to seduce her. The build up to the NTR is very well done and even the non-sex scenes add to the tension. When groping occurs it feels important, as enough build-up has happened before.
Beyond the main story line are varying side stories: one concering suguha, and a great deal with OC characters. This world is corrupt, and both fat bastards and playboys are very interested in convincing girls to cheat. This means that there are a lot of hidden stimulating scenes to discover which greatly adds to the entertainment value while the main ntr takes its time.
The engine allows for a great deal of scenes and the dev knows how to create good scenes with it. If you don't like how the models look in the pictures here don't download, if you do or are on the fence, it's done well and animated.
The engine feels fine, the combat feels a bit excessive to the world but it does add to the playing experience as it's a game for the characters as well. During the play-through I experienced one crash, but it ran smoothly otherwise.
Great game and it will be one of the best if the developer finishes it and if the current translator decides to finish it as well.