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