Finally, Minori (around 30) and Koko (JS) have genuine feelings for each other! Minori wants to take the lead as an older sister, but she ends up being attacked by Koko... Minori's reason is being tested by the gods! Amidst this, they decide who to spend Christmas Eve with through a nipple-targeting game...!? A beautiful teacher × JS runaway onee-loli comedy, Volume 4!!