After having played the SE for every other character in Ninja Assassin, I was completely floored with laughter at how descriptively vague Ichika's Sweet Ending was. It was a good vague, but reading the same euphemism repeatedly only heightened my laughter.
However, I earnestly believe that the writers chose to give Ichika the more explicit scene because Ichika is terribly immature to a majority of readers. In a weird way, they wanted to even out the... overall positivity toward a route. The other guys had more interesting full stories, so the writers could just pass with a
meh bit of intimacy at the end of the very last scene, as unfulfilled as it made me feel. Ichika's was three parts long.
And then the MC took charge! I was actually proud of her for not being like Mononoke Kiss' MC and more like Ninja Love's.