If I get it correctly, the last chapters are about one rather stressful day after a date with Bella. The day started with a hangover, then MC, Nami, Nia and Sonia arrived at the college and sat on the stairs, Ayua found MC and announced "Sunday". Later that day, Bella said she would be out of town for the weekend and she left right after classes, so it's safe to assume it was a Friday. At the end of the day, MC and Nami stayed overnight at Vic and Mila's. According to this, the last chapter ended on Saturday morning. The next announced events are a visit to Nia this day and Ayua's dojo the next day, Sunday. Although there is an unexpected Bella's come back if you are on her route.