By some reason, nips consider every 1st day of the week start on sunday.
I was lurking over the backlog of previous big comic superior issues (they have a backlog on their site), and the ones released in a month with the 1st day of the month being set on Sunday had the issues published on fri. 13rd and 27th.
Going back to the manga, a thing i just happened to overlook 'till now: the "good vs nice" dilemma during the short confrontation between Haru and Yuri. Yuri always had the belief "Miura-kun" was a nice person 'till the moment Haru "corrupted" him, but the latter just shrugged her off by telling her Souta is still a "good guy". Albeit short, it settled the difference in how the girls see and know about Souta. And Yuri failed into the most basic thing needed to know before getting into a healthy relationship:: knowing about the boy she used to "like".