Hm, anyone figured out Ending 6? Game tips that condition is to reach 100 lewd levels in the morning, but since i've already done other endings and reached 100 once, it reset to 99 and all already completed events no longer give any points.
Edit: I have vague recollection that game tipped on some item for ending 6, but i did not really pay enough attention skimping though text to be certain
Finally got around to this. Was waiting for the translation, but decided to run through it first. A bit surprised the responses are so barren, though.
If you reached Ending 4 through reaching 100 lewd level (淫乱度), then you should have received a consumable item 淫乱度ワソアップ that bumps from 99 to 100 at any time. This is so that you can trigger either Ending 4 or 6 as needed through a choice selection after exiting the house in the morning. If I recall correctly:
Ending 1: Complete all of the sisters' requests and reach day 10 (see post #40). Good ending, needed for EXTRA continuation with Endings 4, 5, 6.
Ending 2: ???
Ending 3: Do not complete all of the sisters' requests and reach day 10. Bad ending.
Ending 4: Post-day 10. Follow all lewd events until lewd level (淫乱度) reaches 100, then go back to the first town during the day and it should trigger outside your house.
Ending 5: Post-day 10. Follow all exhibition events including those of the old man hypnotist until exhibition points (露出P) reaches 100 and lewd level (淫乱度) reaches 100 (although 99 is fine if post-Ending 4), then talk to the old man hypnotist at night for the ending.
Ending 6: Post-day 10. Bump the sisters' affection points to MAX, entice each of them for some futanari time (15 times each, with the description keeping count). Then with the lewd level (淫乱度) having reached 100, follow the steps to retrigger Ending 4 (via item 淫乱度ワソアップ), exit the house during the morning, select the 2nd choice when prompted, to watch the events toward completion with the sisters'.
Attached my own saves with the entire progress.
For the life of me, though, I have no idea what Ending 2 is. Somehow it says that everything is complete, but I don't recall seeing it at all.