My Fiercely Loyal Childhood Friend Is Obsessed With Me : He's A Randy Wolf In Puppy's Clothing!!

Chiaki, a woman nearing her thirties, is reunited with her childhood friend, Haruto, when he gets a job at the same company. Recalling their past history, Chiaki thinks of Haruto as a little brother, but it seems Haruto has other ideas... Chiaki is overwhelmed by Haruto's aggressive flirtations. He's certainly no little boy anymore; he knows how to make a woman feel good. Chiaki discovers a new side of her old friend; a look of burning desire, sweet words whispered in her ear... For someone with no experience of dating, Haruto's intense love is a real shock to the system.

(Source: Renta!)