Bound to an S-Rank Training Partner, My Sister Begs Me Not to Stop

Lin Mo, an F-rank good-for-nothing, was forced to hire a sparring partner on the dark web to prepare for his academy’s life-or-death trial and protect his mother’s keepsake. With his account balance at zero, he wagered everything he had on an outrageous post: [S-rank combat ability, C-rank price]. At a warehouse in the dead of night, the stunning mercenary “Nightingale,” with waist-length silver hair and a bombshell figure, showed up as promised. But she kicked him away in disgust. “A useless little runt like you thinks you can hire me?” Yet a contract forcibly bound them together, and Lin Mo unexpectedly awakened the heaven-defying talent [Scales]. As long as this S-rank beauty genuinely helped him, he could analyze all of her combat techniques and even grow stronger alongside her! And that was when things started getting weird. To save money, she rode him on a beat-up hover bike, her soft body pressed against his back as she breathed into his ear, “Hold on tight. If you fall, you’re paying your own medical bills!” [Ding! “Crimson Blade” analysis progress +0.1%!] At the training ground, she shielded him from every taunt and declared with domineering confidence, “He’s my client, and I’ve got his back! Anyone who lays a hand on him will answer to my blade!” [Ding! “Crimson Triple Flash” analysis progress +5%!] When she used up her vital essence to heal him, she felt the vortex inside him greedily absorbing her energy. The S-rank war goddess finally lost her composure. With bedroom eyes, she pinned him against a corner of the wall and rasped, “Kid, would you call this ‘martial souls merging’? Don’t stop. This feeling… it’s addictive!” When the whole school laughed at the F-rank good-for-nothing for clinging to a pretty vase, Lin Mo smiled. Soon, they’d learn that his big sister’s waist wasn’t a waist at all: it was a deadly curved blade. And I’ll be the one wielding it!