Again, that's basically impossible unless he got to the evening section and just went into a vegetative state for 5 hours.
The RPG part is on a timer and unless you're sitting in a item menu it's constantly moving. So a non-interrupted playthrough before the game kicks you out at 17:00 hours is between 45 minutes and an hour. And there's literally no way he could have sat at the evening section for 5 hours and convincingly say he made "progress". In that 6 hour session, at least 3-4 days should have passed and as I stated before....the game auto-saves at least twice per day. Once at the start of a new day and once when you enter the RPG part. At most all he can lose is an hour or so of progress, ACTUAL progress. Not just staring into the void for 5 hours.