'Sup HS.

I'm not the biggest gamer out there. In fact, I'm barely a gamer at all. I don't even like games. But due to my excessively long Summer break, I don't have much to do, so I'd like to get into something.

First off, a little bit about my tastes.
Despite me saying I'm much of a gamer, I have played my fair share of games. A kind-of quick summary:

TF2: Currently 373 hours of play time. Had it for quite a while, but I only play it every now and then for 1-2 hours before I get bored.
Portal/Portal 2: I finished these games too, pretty entertaining.
Maple: Of course. Long hiatus..es? A lot, but I do log in every now and then.
Eden Eternal: I played this a lot for the past couple of weeks, but a fair bit bored of it now.
CS:S: Not very often, and maybe for an hour, maximum, each time.
LoL: Only played a couple games with my friends, but it seems kind of fun.
osu!: This game is also pretty fun, but it's not something I can devote my time to.
Pokemon: Play it on my DS when I'm out. Just started Pokemon White again, but I'm bound to get bored and start using Action Replay codes.
Recettear: Loved this game, though it was pretty short.
TWEWY: I also loved playing this game. Anime-style-ish and whatnot.
SMT: DeSu: Really enjoyed this game, playing multiple routes does get pretty boring, though, since only the last day is different.
SMT: DeSu 2: Stuck on one part near the beginning and too lazy to finish it, but I don't think it's bad.
Visaul Novels (In general): I like them, since it's really close to anime (my favourite form of literary media), but they're way too long and I've never finished one properly.
Skyrim: Played it for a few hours but I got bored of it pretty quickly.
Ace Attorney/Professor Layton: Finished everything (in English) so far, enjoyable experience.

In short: I'm a freaking weeaboo. Love Japanese games, willing to play IN Japanese, since I live in Japan, learning Japanese, helps me practise and all that. FPS, good for parties, but not really helpful for killing time for a few more weeks. MMO games are cool, since I can play with my friends and stuff, like Eden Eternal. Any good DS game recommendations would also be appreciated. Don't have any other consoles, so keep it to just PC and DS please.