[NSFW thread with Birkin.]

[unknownrival]

"Happy birthday, dear," Issei said, leaning over on the couch to give his lover a brief kiss.

On the table in front of them, there were two sets of boxes: two boxes were wrapped in blue paper, each marked 'do not shake', and two smaller boxes were wrapped in pink. There was a vase of red carnations on the table as the first gift Issei'd given.

"Pick anything you like to unwrap first."

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[unknownrival]

The blue ones, when unwrapped, contained a sparkling new microscope and a set of test tubes, beakers of all shapes, and so on. "They're not much on the level of advanced scientific equipment," Issei admitted, "but they are new and I hope they're helpful."

The pink ones, being next, contained a set of sturdy handcuffs and flavored condoms.