Invisible ink

My invisible ink 👀

It's my school story-group plan was made-all write the answers in exam board -no hustle bustle was there -assembly time -some important announcements are made -no cheating -cracking jokes as the backbencher-entered exam hall -very happy because all was on board -was upto using blue ink-teacher took the board -see it -tear the sheets -sent to the principal room - got punished-but still a fun-our group was there -our favorite invisible ink