What is that locked rubber duck icon in the girl interaction screen? I feel like I've almost completed the game & it's still locked.
Also what is "confession"? I see some girls are at 1-2 & some at 0 & I don't even know how it got to 1 or 2
Confessions are whenever you visit the church in the afternoon while the girls are there. Mondays and Tuesdays have Kasumi, Wednesdays and Thursdays are Ayano, and Fridays and Saturdays are Shizuku. You can't go to confessional on Sundays because the girls don't go to church that day.
The locked duck is the bathing option with each girl. Pretty much to unlock bathing with each girl (except Shizuko since you can't bathe with her because she has her own house) you need to max out their level by completing their normal route, then you need to make sure you haven't bathed during the day and the time is evening (last time slot before you automatically sleep), AND there can't be anyone in the bathroom already during that timeslot (RNG), once those conditions are met, an event will pop up in the Bathroom, all you need to do is enter it to trigger the event and unlock bathing with that girl. After you've unlocked the option you can bathe with her at any time, it's just the initial trigger only happens at night/evening.
To give you a cleaner checklist.
1. Finish a sister's route.
2. Don't bathe during the day.
3. Can only happen when shower is empty.
4. Enter bathroom when it has an "Event" notification on it.
And again, Shizuko has no bathing scene. (Because she's not sharing her bathroom at the shop)
It's a bit RNG, but you should get it in like 2 or 3 days at the most.
Also, if you wanna see ALL the content, you're really only halfway through once you complete all the girls' main routes.