I can sing this song without the text.
Watashi wa kono uta o kashinashi de utaeru.
I; me; private affairs; personal matter; secrecy; selfishness
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)
song; classical Japanese poetry (esp. tanka); modern poetry
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.