Translator notes:
Because I was unable to find a kanji version, there may be errors present.
[1] Literally, "However this thorn is not yet known."
[2] In the second line of this stanza, the word "koi" (true/everlasting love) is used. In the third line, "ai" (simple/puppy love) is used. It's not directly translatable.
[3] Literally, "I want to see you in the seiza position tomorrow." The seiza position is where one rests the balls of the feet on the ground and the heels are touching one's bottom. It is often used as a punishment to Japanese children that misbehave as it causes the legs to fall asleep. "Good" Japanese children, especially female ones, are supposed to do this with no problems. Here, it's being used in its other sense, as a metaphor for getting things together.
self-translated