I think these stories are still on the part 4 universe, though "Hot Summer Martha" (the next chapter) is clearly in the Irene-verse. Btw, that daugher Mao's design reminds me of Lulu-chan from Jojolands a lot. Fun fact: this one-shot is the first in the series to be published in a shōjoW-based magazine (shōjo being a genre aimed at young women). The "husband" may be looked familiar to you perhaps to Dolomite's from jojolion design before his accident.
I think these stories are still on the part 4 universe, though "Hot Summer Martha" (the next chapter) is clearly in the Irene-verse. Btw, that daugher Mao's design reminds me of Lulu-chan from Jojolands a lot. Fun fact: this one-shot is the first in the series to be published in a shōjoW-based magazine (shōjo being a genre aimed at young women). The "husband" may be looked familiar to you perhaps to Dolomite's from jojolion design before his accident.