Reimu is apologising to Marisa for not being able to make babies, she is infertile. Marisa is trying to cheer her depressed partner up. An Alice that lives nearby knows about the couple's difficulties and has a bright suggestion.
"City sect Alice will have the babies in place of Reimu for you!" Marisa goes along with the plan easily, and the two are soon going at it like Pitbulls on hear. The third-wheel Reimu is booted outside.
"Marisssaaaaa!! Yuueeeeeen!!!"
But Reimu will put up with it... if this way Marisa can have children, Reimu will put up with it.
With her teeth chattering so much that they are almost getting damaged, Reimu continues to wait outside in the cold.
After spending a lonely night in the elements, Reimu returns to the nesthole to find three babies on the ground enjoying their first meal.
"Marisa's babies are sooooo cute!!" Reimu complements Marisa on the children, and Marisa suddenly gets teary eyed.