I don't know when the last time i leave a comment for vn in this website, but this one got me to pick my hands up and type as soon as i'm done with the gameplay.
[Kinda Spoiler-ish, i guess]
First of all, HEY, i absolutely didn't expect the JuMpScAre. Like- dang, author, you got me good. Played this At Two in the morning, Alone, and man... Love the surprise.
Second, i love how sweet and... questionable (haha) Riker's true feelings is. Really, that guy confuse me sometimes and made me think between 'Aw Ri, Poor MC, don't do that' and 'Just Do MC pls-'. Overall, His characterization is good.
Third, a little suggestion, Author: i'd love to see the MC has several options when Riker decides to... ahem, 'jump on them', i guess? (Typed this made me so awkward argh). Like- maybe we can choose whether we can get the upper-hand or let him get it?. In case some players want to.. dominate the guy and the other just simply want the guy as the dom to them. Though, i'm more of a somewhere in between and would love to see you add a 'switch' trait... if that makes sense. But of course it's up to you what to do with your game and all, i'm just simply giving idea hehe. Don't take it seriously :), feel free to steer the plot to where you want to!.
And last, yes, i love this one a lot! It's been long i've found something like this where the yandere is somewhere between 'Almost Psychopath' and somewhat 'Subtle Yandere'. Not too violent, but not too soft either, love it. And btw, the music when the background changed to red fit Riker so good~ Dare i say, it gave Sensual vibe to him.
And sorry if this too long to read for you!