being the first to enter a freshly-prepared bath

the fourth day of the month / four days

mischievous

warlike, bellicose

(euphemistic, slang) pedophilia (sexual or romantic feelings directed at children)

What you like to do, you will do well. To improve your skills in something, you must enjoy doing it.

御中: belly, tummy, stomach, abdomen; a meal, especially of rice; cotton batting; (historical) the title of a maid working in the inner part of a samurai family's house during the Muromachi period

middle / in

middle / inside / in

middle, medium / average; neither good nor poor / during; being in the process of doing / second volume of a three volume set