Asumi-chan is intrested in Lesbian Brothels volume 1 - Kuro Itsuki

 Aaaah, a good old love story about the one that got away...

Though the title might be a hint where she ended up!  So yes, ecchi inside mucho...

Sweet and weird college student Asumi had a childhood crush on her friend Mai, but their first kiss was a disaster.  During a party, she reflects on this with her senpai, and how that disaster came about due to her inexperience.  Her friend thinks she recognizes Mai from a lesbian brothel, taking Asumi for her first visit ever.

The booked girl doesn't turn out to be Mai, but a gentle girl taking care of the very nervous Asumi.  But as the girl returns to her agency afterwards, she seems to live together with Mai, who still cherishes the same picture as Asumi of both of them when they where younger.  When Asumi decides to find Mai on her own, she starts studying some adult DVD's to research what is out in the world.  

Her next appointment is with Jun, a strong, tomboyish girl that afterwards also seems to know Mai.  Because of the expensive nature of her search, Asumi goes out to look for a part-time job.  She gets hired at Izumi's bar thanks to senpai, which turns out is a maid cafe for female customers only.  On her day off, Izumi takes her along for a photoshoot of ecchi cosplay, that goes a bit further and pays well.   Together with senpai, the money is used to book a double date and Asumi ends up with Ena, a soft first timer girl.

Mai meets with the girls, who all have been with Asumi, who herself is becoming a bit the talk of the town.  She follows a collegue booked by this Asumi girl, and discovers it is indeed her long lost love.  As she showers, she ponders what is going on as a message pops on her phone stating she has been booked by Asumi for next week.

And that will be for the next volume.  It is quite innocent in the Asumi character, and given the title no suprise it is ecchi as well.  But to be honest, I`m still in doubt of this particular series, I will keep following it but I am not certain it will become one of my great series that I read in the past in the end...