[Secret Service (Dororon Ryuuchin)] Heartfull Pairing Chp.1 [Llanowar_Elf] [Full Color]

A guy finally changes his Wi-Fi password for some long-overdue private time, only for his busty childhood sweetheart Marin—who already treats his house like her own and lives just upstairs—to come barging in without a shred of warning. Before he can even get comfortable, strange noises draw a sharp-toothed girl to his door, demanding the new password and his contact info in return. Between Marin's complete lack of boundaries and a fanged intruder who won't take no for an answer, his dream of uninterrupted 'internet surfing' is about to become a very different kind of pairing.