Hm, how did they turn 82 into "pantsu"?
Wikipedia article shed some light on "ichigo" origins but "pantsu" one is complete mystery. (the article https://en.wikipedia.org/wiki/Japanese_numerals)
Wanted pinpoint that ANN article about magazine ending (https://www.animenewsnetwork.com/news/2018-05-31/hakusensha-young-animal-arashi-magazine-ends/.132252) now have Suzu Ōmi and Shigemitsu Harada's Jikyō!! Izumi-kun no Koi Moyō as one of the series that are moved to new magazine.