Honestly, that basement is not worse than my current room, and if a girl I loved set me up with a new room, tended to all my needs, and put a nice 3 inch thick steel door between me and the outside world, I'd probably ask her to marry me right then and there. Although, technically I'm a yandere too, so I might just be biased... :p
Anyway, lovely game. There's not enough games where you actually get to choose to live happily with a yandere. ^^
