I pray for this poor boys sanity and strong will once they hit puberty. Seeing Nana in high schoool makes me think Mana is going to be similar and with how much she hugs and cuddles her childhood friend, good speed Shou.
Well you had a good run Shou-chan, now you're mana's man permanently. She sure as hell isn't letting anyone else near her prey now that she's devoured him whole