Louis

All JLPT 5 grammar : 〇〇方がいい（〇〇方がいい, -hou ga ii）, verb + hou ga ii (ones would better "do" something), with a noun + you ga ii ("something" is better)

All JLPT 5 grammar : 無くてはいけない（なくてはいけない, nakute wa ikenai）, cannot do without something; indispensable; absolutely necessary

All JLPT 5 grammar : 一緒に（いっしょに, issho ni）, together (with); at the same time; in a lump

All JLPT 5 grammar : が（が, ga）, indicates sentence subject (occasionally object)

All JLPT 4 grammar : てしまう / ちゃう（てしまう / ちゃう, te shimau / chau）, verb + te shimau, used when someone did something wrong but that there is no way to correct his or her mistake

All JLPT 4 grammar : なかなか〇〇ない（なかなか〇〇ない, nakanaka-nai）, very; considerably; easily; readily; fairly; quite; highly; rather

All JLPT 4 grammar : 事にする（ことにする, koto ni suru）, to make the choice to do .., to decide to ..

All JLPT 4 grammar : 事になる（ことになる, koto ni naru）, to have been decided (so) that; to have been arranged (so) that

All JLPT 4 grammar : 御座います（ございます, gozaimasu）, to be; to exist