Shion to One Room -Kizuna Kirameku Koi Iroha SS-

After graduating, Touki moved from Acadamy Island to the mainland and now lives alone. Shion often comes over when the weekend rolls around and they spend sweet lovey-dovey time flirting as lovers. Their second anniversary is fast approaching-- this year they want to celebrate it with just the two of them. With this anniversary just around the corner, they decide to surprise one another...

[Translated from the official page]