They exposed a lot of barriers afterwards.Alright then, what else would you suggest...Right...Hm, you didn't know? 11/12 is "Good Sealing Day."
The kanji here, 秘封 (read as hi fuu), is the same used in the name of their club, the Sealing Club. As for the date pun: the 1's in 11 can be read as ii (いい, good/nice) and the 12 can be read as hi fu (one-two instead of twelve), which is phonetically identical to 秘封, hence the substitution.Merry~Eh, wai-, what are you doing all of a sudden, Renko?Found an opening.Wait wait, isn't that too much of a stretch!? Why did it have to be a kiss?