If It's You, I Might Try Falling in Love, Vol. 4

Amane and Ryuuji are so over the moon with each other, the several months since they began dating have gone by in a blink! With the cultural festival and the closing party behind them, the next thing on their list is Ryuuji's birthday. To treat his boyfriend to the home-cooked meal he longs for, Amane invites Ryuuji over to his house. But as one thing leads to another, this innocuous dinner date starts to look an awful lot like a sleepover in the making...