The formal-form ("desu"-table) using if you e.g. with teacher or with another higher person speaking...
And the daily-form ( "da"-table) using if you with your family or with friends (how I)...etc. speaking...
E.g.: I'm would your teacher be, then would you to me say: "O-hayou degozaimasu x-sensei! (Good morning x-teacher!) Kyou wa ii tenki desu ne~ (Today is a nice weather~)". And I if your firend would (but we are), Then so: "Kimi ga ii da (You're nice...)...etc."
I find that the best way to learn kanji is to get some Japanese reading material and have a dictionary beside you as you go. It's painfully slow but it gets absorbed.
Hi, I'm just asking. Do you have the latest version of this title? It's the only one missing from your collection by this developer. The dev himself had stopped making games a long time ago too. 白濁に染まりし紋章 (final ver: v16.10.11)