will you marry me

A stock phrase in Japanese pop culture supposedly used by the wife in a newly-wed couple to invite her new husband to bed.

Kyūjitai form of 私生児 (“illegitimate child”)

a birthday

regular day off (e.g. closed every Monday)

the twentieth day of the month / twenty days / Short for 二十日鼠 (hatsuka nezumi): a house mouse

幾日も幾日も: day after day

(literally) plan your day during the morning, plan your year during New Year's / early planning is the key to success

(literally) a beautiful single red flower that blooms within a field of trees and grass / (figuratively) something unique that stands out among many other things

You should treasure every encounter, for it will never recur.