Vocabulary consisting only from characters you are able to read
恋愛
れんあい
love/love-making/passion/emotion/affections/(P)ai, jlpt3, suru
兆し
きざし
signs, omen, symptomsmix
いつの間にか
いつのまにか
before one knows, before one becomes aware of, unnoticed, unawaresjlpt3
十億
じゅうおく
1,000,000,000, billion (American), (obs) milliard (British)mix
間
かん
sufix pro dobu trváníleda1
幸
さち
(1)good luck, fortune, happiness, (2)harvest, yield mix