i need help on a タイトル

Well, in Japanese culture, ネコ are symbolic of good fortune. So maybe something to do with fortune または luck in the title.

But of course, the story doesn't sound like the characters are overly fortunate. The Japanese チェリー Blossom can symbolize many things, including Innocence, Spring, Simplicity, New Beginnings, Bright Future, Purity, Melancholy, Transience of Life, Drops of Blood. They have also been used for beautifying the suicide of military people.

あなた could also play with Chinese Elements. Wood, for example, can symbolize the yearn for adventure and challenge. It also shows the capability of succeeding against all odds. It shows over-competitiveness and strength of character as well as very good insight. It also shows difficulty with decision-making and tendency to be easily stressed, as well as some anger issues.

あなた could also use direction. In Native American culture, North has often been associated with defeat and trouble. East has been often associated with success and triumph. South has been thought of as a symbol of peace and happiness, while West has been thought of as a symbol of death.

So maybe あなた could play around with those things. Research different types of symbolism (especially Japanese). If あなた get some good combination like that, あなた could come up with some beautiful and meaningful titles :)